Exponentiation

input/code.cpp: In function 'void Test()':
input/code.cpp:45:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     freopen("temp\\in.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

#include <bits/stdc++.h>
typedef long long LL;
using namespace std;

LL M = 1e9 + 7;

inline LL Add(const LL& a, const LL& b)
{
    LL c = a + b;
    if(c > M) c -= M;
    if(c < 0) c += M;
    return c;
} 

inline LL Mul(const LL& a, const LL& b) {
    return (a * b) % M;
}

LL MulSlow(LL a, LL b)
{
    LL ans = 0;
    while(b)
    {
        if(b & 1) ans = Add(ans, a);
        a = Add(a, a);
        b >>= 1; 
    }
    return ans;
} 

LL Pow(LL a, int k)
{
    LL ans = 1;
    while(k)
    {
        if(k & 1) ans = Mul(ans, a);
        a = Mul(a, a);
        k >>= 1;
    }
    return ans;
}

void Test()
{
    freopen("temp\\in.txt", "r", stdin);
}
int main()
{
    // Test();
    int n;
    cin >> n;
    while (n--)
    {
        LL a, b;
        cin >> a >> b;
        cout << Pow(a, b) << endl;
    }
    
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED