Exponentiation

import sys

sys.setrecursionlimit(10**6)
input = sys.stdin.readline
mod = 10**9+7
def fast_exp(a, b):
    if b == 0:
        return 1
    g = 1
    while  b > 1:
        if b % 2 == 1:
            g = (g * a) % mod
            b -= 1
        a = (a * a) % mod
        b //= 2
    return (a * g) % mod


n = int(input())
for i in range(n):
    a, b = map(int, input().split())
    print(fast_exp(a, b))

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED