Cod sursa(job #2042680)

Utilizator mitza23Mihai Grebla mitza23 Data 18 octombrie 2017 22:02:28
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.51 kb
#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream f("lgput.in");
    ofstream g("lgput.out");
    int a,b,t;
    unsigned long long int rez,  mod=1999999973;
    f>>a>>b;
    t=1;
    if(b==0)
        rez = 1;
    if(b==1)
        rez = a;
    while(b>1){
        if(b%2==0){
            a=(a*a)%mod;
            b=b/2;
        }
        else{
            t=a;
            a=(a*a)%mod;
            b=b/2;

        }
    }
    rez=(a*t)%mod;
    g<<rez;
}