Cod sursa(job #1001136)

Utilizator alexx.cosmaCosma Cristian Alexandru alexx.cosma Data 24 septembrie 2013 16:01:25
Problema Ridicare la putere in timp logaritmic Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.54 kb
#include <iostream>
#include <fstream>

using namespace std;

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

int weird = 1999999973;

long long powLog(int n, int p);

int main()
{

    int n,p;

    fin>>n;
    fin>>p;
    fout << powLog(n,p)% weird;

    return 0;
}

long long powLog(int n, int p)
{
    if(p==0) return 1;
    else if(p==1) return n % weird;
    else if(p%2==0) return powLog(((long long)n*n )% weird,p/2)% weird;
    else return ((long long)n*powLog(((long long)n*n)% weird,(p-1)/2))% weird;
}