Cod sursa(job #228073)
Utilizator | Data | 6 decembrie 2008 13:03:47 | |
---|---|---|---|
Problema | Koba | Scor | 30 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.51 kb |
#include<fstream>
using namespace std;
ifstream fin ("koba.in");
ofstream fout ("koba.out");
int main ()
{
int n,i;
fin>>n;
long long unsigned s,b,c,d,a;
fin>>a>>b>>c;
s=a%10+b%10+c%10;
for(i=3;i<n;i++)
{
d=(c+b*a)%10;
// d+=b*a;
// d%=10;
a=b;
b=c;
c=d;
s+=c; }
// fout<<a<<" "<<b<<" "<<c<<"\n";}
//s=0;
//for(i=1;i<=n;i++)
//s+=(a[i]%10);
fout<<s;
return 0;
}