Cod sursa(job #478071)

Utilizator soare_cristian16Cristy93 soare_cristian16 Data 17 august 2010 12:47:32
Problema Divk Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.35 kb
Raporteaza aceasta sursa 
#include<fstream>
using namespace std;
ifstream f("divk.in");
ofstream g("divk.out");
int n,k,a,b,s[500001],v[500001],x;
long long rez;
int main()
{
	int i;
	f>>n>>k>>a>>b;
	for(i=1;i<=n;i++)
	{
		f>>x;
		s[i]=(s[i-1]+x)%k;
	}
	for(i=a;i<=n;i++)
	{
		v[s[i-a]]++;
		if(i-b-1>=0)
			v[s[i-b-1]]--;
		rez+=v[s[i]];
	}
	g<<rez;
	return 0;
}