Cod sursa(job #1897657)
| Utilizator | Data | 1 martie 2017 17:01:52 | |
|---|---|---|---|
| Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva educationala | Marime | 0.56 kb |
#include <iostream>
#include <fstream>
#define mod 1999999973
using namespace std;
ifstream f("lgput.in");
ofstream g("lgput.out");
int log(int x, int p)
{
if(p < 0) return log(1/x, -p);
else
{
if(p == 0) return 1;
else
{
if(p == 1) return x;
else
{
if(p % 2 == 0) return log(x*x, p/2);
else return x*log(x*x, (p-1)/2);
}
}
}
}
int main()
{
int n, p;
f >> n >> p;
g << log(n, p);
return 0;
}
