Particle accelerator

import sys 
input_d = sys.stdin.read().split()
n = int(input_d[0])
mass = [int(i) for i in input_d[1:]]


def collide(a,b):
    print(a,b)
    ma = mass[a]
    mb = mass[b]
    return ma*mb - (min(ma,mb))**2
def collide1(a,b):
    return a*b - (min(a,b))**2


if n== 1:
    print(0)
    exit()


dic = {}
dp = {}
total_cost = 0
for c in range(n-1):

    for k in range(len(mass)):
        print(k,mass)
        if k ==0:
            left_collision = collide(0,len(mass)-1)
            right_collision= collide(0,1)
            dic[0,1] = right_collision
            dic[0,n-1] = left_collision
        else :
            if k+1 < n :
                right_collision= collide(k,k+1)
            if k-1 >= 0 :
                left_collision = collide(k,k-1)
            dic[k,k+1] = right_collision
            dic[k,k-1] = left_collision
        dp[k] = min(left_collision,right_collision)
    min_cost = min(dp)
    merge_ind = min(dp,key=lambda x: dp[x])
    min_cost = dp.get(merge_ind)
    total_cost+= min_cost
    dp.pop(merge_ind)
    side = 0
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
        side=-1
        a,b = merge_ind, merge_ind-1
    else: 
        side = 1
        a,b = merge_ind,merge_ind+1

    #a,b = min(dic[merge_ind,merge_ind-1],dic[merge_ind,merge_ind+1])
    mass[merge_ind] = a+b 
    mass.pop(merge_ind+side)


print(total_cost)

    
print(dic)

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 4

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 5

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 6

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 7

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 8

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 9

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 10

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 11

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 12

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 13

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 14

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 15

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 16

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 17

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 18

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 19

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 20

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 21

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 22

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 23

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 24

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 25

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 47, in <module>
    if dic[merge_ind,merge_ind-1] < dic[merge_ind,merge_ind+1]:
KeyError: (0, -1)

Test 26

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 27

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 28

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 29

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 30

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 31

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 32

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 33

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 34

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 35

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 36

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 37

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 38

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 39

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 40

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 41

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 42

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 43

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 44

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 45

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 46

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 47

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 48

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 49

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 50

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 51

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 52

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 53

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 54

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 55

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 56

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 57

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 58

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 59

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 60

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 61

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 62

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 63

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 64

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 65

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 66

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 67

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 68

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 69

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 70

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 71

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 72

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 73

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 74

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 75

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 76

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 77

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 78

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 79

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 80

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 81

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 82

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 83

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 84

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 85

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 86

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 87

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 88

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 89

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 90

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range

Test 91

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "/box/input/code.py", line 35, in <module>
    right_collision= collide(k,k+1)
  File "/box/input/code.py", line 10, in collide
    mb = mass[b]
IndexError: list index out of range