Cod sursa(job #392591)
Utilizator | Licker Nandor nando | Data | 7 februarie 2010 19:57:26 |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.45 kb |
#include <fstream>
#include <iostream>
using namespace std;
long long b=1999999973;
unsigned pow(long long n,long long k){
long long tmp;
if(k==1){
return n;
}else if(k&1){
return (n*pow(n*n%b,k>>1))%b;
}else if(!(k&1)){
return pow((n*n%b)%b,k>>1);
}
}
int main(){
fstream fin("lgput.in",ios::in);
fstream fout("lgput.out",ios::out);
long long n,k;
fin>>n>>k;
fout<<pow(n,k);
fin.close();
fout.close();
return 0;
}