Cod sursa(job #562436)
| Utilizator | Data | 23 martie 2011 01:52:52 | |
|---|---|---|---|
| Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva educationala | Marime | 0.49 kb |
#include <fstream>
using namespace std;
#define MOD 1999999973;
int pow(int a, int b)
{
int c=1;
for(int i=0; i<b; i++)
c=c*a;
return c;
}
int exp(int N, int P)
{
int b=1, EXP=1;
for(int i=0; i<32; i++)
{
if(P&1)
EXP*=(pow(N, (P&1)*b)) % MOD;
P=P>>1;
b*=2;
}
return EXP;
}
int main()
{
int N, P;
ifstream fin("lgput.in");
fin>>N>>P;
fin.close();
ofstream fout("lgput.out");
fout<<exp(N, P);
fout.close();
return 0;
}