Cod sursa(job #340320)
Utilizator | Data | 14 august 2009 10:25:24 | |
---|---|---|---|
Problema | Koba | Scor | 30 |
Compilator | cpp | Status | done |
Runda | w3 | Marime | 0.34 kb |
#include <stdio.h>
long s,a,b,c,d,n,i;
int main(){
FILE *f,*g;
f=fopen("koba.in","r");
g=fopen("koba.out","w");
fscanf(f,"%ld%ld%ld%ld",&n,&a,&b,&c);
n-=3;
a%=10;b%=10;c%=10;
long s=a+b+c;
for(i=1;i<=n;i++){
d=(c+(b*a)%10)%10;
s+=d;
a=b;
b=c;
c=d;
}
fprintf(g,"%ld\n",s);
fclose(f);
fclose(g);
return 0;
}