Cod sursa(job #2588641)
Utilizator | cristian vintila CristiVintila | Data | 25 martie 2020 10:10:13 |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.54 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("lgput.in");
ofstream fout("lgput.out");
const int MOD = 1999999973;
int ridicarePutere(int x, int n) {
if (n == 0)
return 1 & MOD;
else if (n == 1)
return x % MOD;
else if(n % 2 == 0)
return ridicarePutere(x * x, n / 2) % MOD;
else if (n % 2 == 1)
return x % MOD * ridicarePutere(x * x, (n - 1) / 2) % MOD;
return 0;
}
int main(int argc, const char * argv[]) {
int n, p;
fin >> n >> p;
fout << ridicarePutere(n, p);
}