Cod sursa(job #1513875)

Utilizator andreiblajdevAndrei Blaj andreiblajdev Data 30 octombrie 2015 09:38:41
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.56 kb
#include <iostream>
#include <fstream>

#define mod 1999999973

using namespace std;

ifstream fi("lgput.in");
ofstream fo("lgput.out");

long n, p;

void solve();
long lgput(long n, long p);

int main()
{
    
    solve();
    
    fi.close();
    fo.close();
    
    return 0;
}

void solve()
{
    fi >> n >> p;
    fo << lgput(n, p);
}

long lgput(long n, long p)
{
    if (p == 1)
        return n;
    
    long half = lgput(n, p/2) % mod;

    if (p % 2 == 1)
        return (((half * half) % mod) * n) % mod;
    else
        return (half * half) % mod;
    
}