Mai intai trebuie sa te autentifici.
Cod sursa(job #3135891)
Utilizator | Data | 4 iunie 2023 17:12:53 | |
---|---|---|---|
Problema | Ridicare la putere in timp logaritmic | Scor | 0 |
Compilator | c-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.86 kb |
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define modulo 1999999973
void citire( const char* path, long long* x,long long *n)
{
FILE *f;
if((f=fopen(path,"r"))==NULL)
{
printf("eroare la citire");
exit(-1);
}
fscanf(f,"%ld%ld",x,n);
fclose(f);
}
int expo(long long x, long long n)
{
if(n==0)
return 1;
if(n%2==1)
return (x*expo(x*x,n/2))%modulo;
if(n%2==0)
return expo(x*x,n/2)%modulo;
}
void scriere(const char* path,int p)
{
FILE *f;
if((f=fopen(path,"w"))==NULL)
{
printf("eroare la scriere");
exit(-1);
}
fprintf(f,"%d\n",p);
fclose(f);
}
int main(void)
{
long long x,n;
citire("lgput.in.txt",&x,&n);
int power=expo(x,n);
scriere("lgput.out.txt",power);
return 0;
}