Cod sursa(job #1094963)
Utilizator | Ioo Andrei Rares swxx | Data | 30 ianuarie 2014 03:01:42 |
---|---|---|---|
Problema | Factorial | Scor | 5 |
Compilator | c | Status | done |
Runda | Arhiva de probleme | Marime | 0.41 kb |
#include <stdio.h>
#include <stdlib.h>
long long o;
int main()
{
FILE *in, *out;
in = fopen("fact.in", "r");
out = fopen("fact.out", "w");
fscanf(in,"%lld",&o);
long long s=0,q=0,i;
if(o!=0)
{
for( i=5;s<=o;i=i+5)
{
q=i;
while(q%5==0)
{
s=s+1;
q=q/5;
}
}
if(s!=o)fprintf(out,"%lld",-1);
else fprintf(out,"%lld",i);
}
else fprintf(out,"%lld",1);
return 0;
}