Cod sursa(job #2486011)

Utilizator ANNOnymousMihaila Stefan-Alexandru ANNOnymous Data 2 noiembrie 2019 11:19:16
Problema Invers modular Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.6 kb
#include <bits/stdc++.h>

using namespace std;
ifstream f("inversmodular.in");
ofstream g("inversmodular.out");
long long po(long long nr,long long g){
 long long t=1;
 for(long long i=1;i<=g;i++){
   t*=nr;
 }
 return t;
}
long long phi(long long nr){
long long phi=nr;
for(long long i=2;i*i<=nr;i++){
    if(nr%i==0){
        while(nr%i==0)nr/=i;
        phi=phi/i*(i-1);
    }
}
if(nr!=1)phi=phi/nr*(nr-1);
return phi;
}
int main()
{long long n,m;
 long long phinr,s=1;
 f>>n>>m;
 phinr=phi(m)-1;
 while(phinr){
    if(phinr&1)s=(s*n)%m;
    n=(n*n)%m;
    phinr>>=1;
 }
 g<<s;
}