H-大数乘法

题目描述

Problem Description

给定a，b，c，要求按照以下程序计算ans： ans=1 for(i=1;i>= 1; } return ret; } AC Code

#include 
#define IOF ios_base::sync_with_stdio(0)
#define ll long long
using namespace std;
ll a, b ,c;

ll qmul(ll a, ll b, ll mod) {
    ll res = 0;
    while (b) {
        if (b & 1) res = (res + a) % mod;
        (a = 1;
    }
    return res;
}

ll qpow_mod(ll a, ll n, ll mod) {
    ll ret = 1;
    while (n) {
        if (n & 1) ret = qmul(ret, a, mod);
        a = qmul(a, a, mod);
        n >>= 1;
    }
    return ret;
}

int main(){
    IOF;
    while (cin >> a >> b >> c){
        cout