Cod sursa(job #732923)
Utilizator | Data | 11 aprilie 2012 11:09:57 | |
---|---|---|---|
Problema | Divk | Scor | 90 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.41 kb |
#include <iostream>
#include <fstream>
#define NR 500001
using namespace std;
ifstream fin("divk.in");
ofstream fout("divk.out");
int v[NR],k,a,b,n,div2,f[NR];
void citire()
{
fin>>n>>k>>a>>b;
for(int i=1;i<=n;i++)
{
int x;
fin>>x;
v[i]=(v[i-1]+x)%k;
if(i>=a) ++f[v[i-a]];
if(i>b) --f[v[i-b-1]];
div2+=f[v[i]];
}
}
int main()
{
citire();
fout<<div2;
return 0;
}