Cod sursa(job #2452857)
Utilizator | Data | 1 septembrie 2019 14:39:36 | |
---|---|---|---|
Problema | Divk | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.52 kb |
#include <bits/stdc++.h>
///N=500000
///K=100000
using namespace std;
///
ifstream fin("divk.in");
ofstream fout("divk.out");
///
typedef long long ll;
ll n, k, a, b, i, j, sol;
ll sum[500001], rest[100000];
///
int main()
{
fin>>n>>k>>a>>b;
for(i=1; i<=n; ++i){
ll x;
fin>>x;
sum[i]=(sum[i-1]+x)%k;
if(i>=a) ++rest[sum[i-a]];
if(i>b) --rest[sum[i-b-1]];
sol+=rest[sum[i]];
}
fout<<sol;
fin.close();
fout.close();
return 0;
}