Cod sursa(job #3037472)
| Utilizator | Data | 25 martie 2023 16:05:37 | |
|---|---|---|---|
| Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
| Compilator | cpp-64 | Status | done |
| Runda | Arhiva educationala | Marime | 0.58 kb |
#include <fstream>
using namespace std;
int putere(int a, int b, int c = 1999999973) {
int rest = 0;
int x = 1;
if(b <= 2) {
for(int i = 0; i < b; ++i) {
x = x * a;
}
return x % c;
}
if(b % 2 == 0) {
rest = putere(a, b/2, c) * putere(a, b/2, c);
rest = rest % c;
} else {
rest = a * putere(a, b-1, c);
rest = rest % c;
}
return rest;
}
int main() {
int n, p;
ifstream in("lgput.in");
ofstream out("lgput.out");
in >> n >> p;
out << putere(n, p);
}