Cod sursa(job #2175115)

Utilizator dumitrescu_andreiDumitrescu Andrei dumitrescu_andrei Data 16 martie 2018 15:22:07
Problema Invers modular Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 0.45 kb
#include <bits/stdc++.h>
using namespace std;

ifstream f("inversmodular.in");
ofstream g("inversmodular.out");

long long x,n;

long long inv(long long x,long long n,long long mod)
{
    long long ans = 1;
    while(n)
    {
        if(n%2)
        {
            n--;
            ans=(ans*x)%mod;
        }
        n/=2;
        x=(x*x)%mod;
    }
    return ans;
}

int main()
{
    f>>x>>n;
    g<<inv(x,n-2,n);
    return 0;
}