CSES - Datatähti 2022 alku - Results
 Task: Spiraali (Spiral) Sender: arde100 Submission time: 2021-10-10 14:26:41 Language: CPython3 Status: READY Result: 100
Feedback
groupverdictscore
#1ACCEPTED15
#2ACCEPTED20
#3ACCEPTED65
Test results
testverdicttimegroup
#1ACCEPTED0.02 s1details
#2ACCEPTED0.03 s2details
#3ACCEPTED0.03 s3details

### Code

```n,t = input().split()
n = int(n)
t = int(t)

testit = []

for i in range(t):
y,x = input().split()
y = int(y)
x = int(x)
testit.append((y-1,x-1))

for i in testit:
x = i[1]
y = i[0]
x_r = (n-1)/2 - abs(x - (n-1) / 2)
y_r = (n-1)/2 - abs(y - (n-1) / 2)
r = int(min(x_r,y_r))

# Laskee ensimmäisen kierroksen pituuden (jos n=10, tulee 36)
r_0 = 4*(n-1)
# Laskee halutun kierroksen pituuden (1,4=24)
r_bef_h = int(r_0 - 8*(r-1))
r_h = int(r_0 - 8*r)
r_first = (r*((r_0+r_bef_h)//2)) + 1
#print(r,r_0,r_bef_h,r_first)

# Jos ollaan vasemmassa reunassa
if x == r:
num = r_first + y - r

# Jos ollaan alarivissä
elif y == r + r_h//4:
num = r_first + (r_h//4) + (x - r)

# Jos ollaan oikeassa reunassa
elif x == r + r_h//4:
num = r_first + 2*(r_h//4) + (r_h//4 - (y - r))

# Jos ollaan ylärivissä
elif y == r:
num = r_first + 3*(r_h//4) + (r_h//4 - (x - r))

print(int(num))

```

### Test details

#### Test 1

Group: 1

Verdict: ACCEPTED

input
10 100
1 1
1 2
1 3
1 4
...

correct output
1
36
35
34
33
...

user output
1
36
35
34
33
...

#### Test 2

Group: 2

Verdict: ACCEPTED

input
1000 1000
371 263
915 322
946 880
53 738
...

correct output
773533
312166
206053
200080
593922
...

user output
773533
312166
206053
200080
593922
...

#### Test 3

Group: 3

Verdict: ACCEPTED

input
1000000000 1000
177757853 827347032
409613589 419171337
739269360 256524697
328695530 896842209
...

correct output
571375684522141210
967321186816598569
762879105851175000
370065046779516790
936897883750373771
...

user output
571375684522141210
967321186816598569
762879105851175000
370065046779516790
936897883750373771
...