Cod sursa(job #1937659)
Utilizator | rrewrew narto | Data | 24 martie 2017 09:16:02 |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.47 kb |
#include <fstream>
#define mod 1999999973
using namespace std;
ifstream f("lgput.in");
ofstream g("lgput.out");
long long exp_by_squaring(int x,int n)
{
if (n == 1)
return x%mod ;
else
{ if (n%2==0)
return exp_by_squaring((x * x)%mod, (n / 2)%mod);
else if (n%2==1)
return x * exp_by_squaring((x * x)%mod, ((n - 1) / 2)%mod);
}
}
int main()
{
int n, m;
f>>n>>m;
g<<exp_by_squaring(n,m);
}