Cod sursa(job #172836)
| Utilizator | Data | 6 aprilie 2008 20:19:28 | |
|---|---|---|---|
| Problema | Suma divizorilor | Scor | 30 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.55 kb |
#include<stdio.h>
long long mod(long long a,long long b,long long c)
{if(b==1) return a%c;
else if(b%2==0) return (mod(a,b/2,c)*mod(a,b/2,c))%c;
else return (mod(a,b-1,c)*mod(a,1,c))%c;
}
long long sumdiv(long long a,long long b,long long c)
{if(b==0) return 1;
else return mod(a,b,c)+sumdiv(a,b-1,c);
}
int main()
{long long a,b,p;
FILE*f=fopen("sumdiv.in","r");
FILE*g=fopen("sumdiv.out","w");
fscanf(f,"%lld %lld",&a,&b);
if(a==0) p=0;
else if(a==1) p=1;
else p=sumdiv(a,b,9901);
fprintf(g,"%lld",p);
fcloseall();
}
