Cod sursa(job #2190272)

Utilizator int100Stanciu Calin int100 Data 30 martie 2018 13:13:40
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.46 kb
#include <iostream>
#include <fstream>
using namespace std;
int fpow(int x,int n){
    if(n<0)
        return fpow(1/x,-n);
    else if(n==0)
        return 1;
    else if(n==1)
        return x;
    else if(n%2==0)
        return fpow(x*x,n/2);
    else if(n%2==1)
        return x*fpow(x*x,(n-1)/2);
}
int main(){
    ifstream f("lgput.in");
    ofstream o("lgput.out");
    int n,x;
    f>>x>>n;
    o<<fpow(x,n)%1999999973;
    return 0;
}