Cod sursa(job #1125138)

Utilizator 2dorTudor Ciurca 2dor Data 26 februarie 2014 15:52:16
Problema Invers modular Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.51 kb
/*solutie ce functioneaza doar cu N prim*/
#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("inversmodular.in");
ofstream fout("inversmodular.out");

int A, M;

int lgput(int N, int P) {
    int Sol = 1;
    int MO = P + 2;
    while (P) {
        if (P % 2)
            Sol = (Sol * N) % MO;
        N = (N * N) % MO;
        P /= 2;
    }
    return Sol;
}

int main() {
    fin >> A >> M;
    fout << lgput(A, M - 2);
    fin.close();
    fout.close();
    return 0;
}