Cod sursa(job #2588642)

Utilizator CristiVintilacristian vintila CristiVintila Data 25 martie 2020 10:12:04
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.56 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("lgput.in");
ofstream fout("lgput.out");

const int MOD = 1999999973;
int ridicarePutere(int x, int n) {
    if (n == 0)
        return 1 & MOD;
    else if (n == 1)
        return x % MOD;
    else if(n % 2 == 0)
        return ridicarePutere(x * x % MOD, n / 2) % MOD;
    else if (n % 2 == 1)
        return x % MOD * ridicarePutere(x * x % MOD, (n - 1) / 2) % MOD;
    return 0;
}

int main(int argc, const char * argv[]) {
    int n, p;
    fin >> n >> p;
    fout << ridicarePutere(n, p) % MOD;
}