Cod sursa(job #2190283)
Utilizator | Data | 30 martie 2018 13:35:33 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.43 kb |
#include <iostream>
#include <fstream>
using namespace std;
long long n,x;
long long fpow(long long x,long long n){
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");
f>>x>>n;
o<<(long long)fpow(x,n);
return 0;
}