Exponentiation

#include <bits/stdc++.h>
using namespace std;
#define rep(i, a, b) for(int i=a;i<(b);++i)
#define all(x) begin(x),end(x)
#define sz(x) int((x).size())
using ll = long long;
using pii = pair<int,int>;
using vi = vector<int>;
using ld = long double;

const int M = 1e9+7;

int mpow(ll a, ll p) {
  ll r = 1;
  while (p != 0) {
    if (p & 1) {
      r *= a; r %= M;
    }
    a *= a; a %= M;
    p >>= 1;
  }
  return r;
}

int main() {
  int n;
  cin >> n;
  rep(i,0,n) {
    int a, b;
    cin >> a >> b;
    cout << mpow(a,b) << '\n';
  }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED