Cod sursa(job #2811167)

Utilizator CiuiGinjoveanu Dragos Ciui Data 1 decembrie 2021 13:46:38
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.48 kb
#include <iostream>
#include <fstream>
using namespace std;

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

int putere(int a, int b, int c) {
    if (b == 0) {
        return 1 % c;
    }
    if (b == 1) {
        return a % c;
    }
    if (b % 2 == 0) {
         return (putere(a, b/ 2, c) * putere(a, b/ 2, c)) % c;
    } else {
         return (a * putere(a, b - 1, c)) % c;
    }
}

int main() {
    int a, b;
    fin >> a >> b;
    fout << putere(a, b, 1999999973);
    return 0;
}