Cod sursa(job #1344996)
Utilizator | Data | 17 februarie 2015 10:15:38 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.45 kb |
#include <stdio.h>
#define p 1999999973
unsigned long a,b;
inline unsigned long powtt(unsigned long a, unsigned long b){
if(!a)
return 0;
if(!b)
return 1;
if(b==1)
return a%p;
a%=p;
if(b%2==0)
return powtt(a,b/2)*powtt(a,b/2);
return powtt(a,b-1)*a;
}
int main(){
FILE*f=fopen("lgput.in","r");
fscanf(f,"%ld %ld",&a,&b);
fclose(f);
FILE*g=fopen("lgput.out","w");
fprintf(g,"%ld",powtt(a,b));
fclose(g);
return 0;
}