CSES - Aalto Competitive Programming 2024 - wk11 - Homework - Results
Submission details
Task:Finding inverse
Sender:hungdojan
Submission time:2024-11-16 10:21:56 +0200
Language:Python3 (PyPy3)
Status:READY
Result:
Test results
testverdicttime
#10.04 sdetails
#2ACCEPTED0.04 sdetails
#3ACCEPTED0.04 sdetails
#4ACCEPTED0.04 sdetails
#5ACCEPTED0.04 sdetails
#6ACCEPTED0.04 sdetails
#7ACCEPTED0.04 sdetails
#8ACCEPTED0.04 sdetails
#90.04 sdetails
#10ACCEPTED0.04 sdetails
#11ACCEPTED0.04 sdetails
#12ACCEPTED0.04 sdetails
#13ACCEPTED0.04 sdetails
#140.06 sdetails

Code

nums = [int(i) for i in input().split()]
a, m = nums[0], nums[1]
if a % 2 == 0:
    print(-1)
else:
    print(pow(a, -1, m))

Test details

Test 1

Verdict:

input
6 7

correct output
6

user output
-1

Test 2

Verdict: ACCEPTED

input
0 7

correct output
-1

user output
-1

Test 3

Verdict: ACCEPTED

input
5 78

correct output
47

user output
47

Test 4

Verdict: ACCEPTED

input
89 99

correct output
89

user output
89

Test 5

Verdict: ACCEPTED

input
0 61

correct output
-1

user output
-1

Test 6

Verdict: ACCEPTED

input
897 947

correct output
625

user output
625

Test 7

Verdict: ACCEPTED

input
419 538

correct output
217

user output
217

Test 8

Verdict: ACCEPTED

input
32 938

correct output
-1

user output
-1

Test 9

Verdict:

input
184120 505187

correct output
438779

user output
-1

Test 10

Verdict: ACCEPTED

input
264601 885661

correct output
360221

user output
360221

Test 11

Verdict: ACCEPTED

input
40310 590135

correct output
-1

user output
-1

Test 12

Verdict: ACCEPTED

input
202254499 577081420

correct output
128866679

user output
128866679

Test 13

Verdict: ACCEPTED

input
539836073 888851205

correct output
797044652

user output
797044652

Test 14

Verdict:

input
697847215 756971670

correct output
-1

user output
(empty)

Error:
Traceback (most recent call last):
  File "input/code.py", line 6, in <module>
    print(pow(a, -1, m))
ValueError: base is not invertible for the given modulus