Finding inverse

a, m = [int(x) for x in input().split()]

t = 0
r = m
new_t = 1
new_r = a

while new_r != 0:
    quotient = r // new_r
    t, new_t = new_t, t - quotient*new_t
    r, new_r = new_r, r - quotient*new_r

if r > 1:
    print(-1)
else:
    if t < 0:
        t = t + m
    print(t)

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED