Cod sursa(job #2098383)
Utilizator | Data | 2 ianuarie 2018 19:17:13 | |
---|---|---|---|
Problema | Divk | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.49 kb |
#include <bits/stdc++.h>
using namespace std;
int v[500005],f[500005];
int main()
{
freopen("divk.in","r",stdin);
freopen("divk.out","w",stdout);
int n,k,a,b,i;
long long cnt=0;
scanf("%d%d%d%d",&n,&k,&a,&b);
for(i=1;i<=n;++i)
{
scanf("%d",&v[i]);
v[i]+=v[i-1];
v[i]%=k;
if(a<=i)
f[v[i-a]]++;
if(b<i)
f[v[i-b-1]]--;
cnt+=f[v[i]];
}
printf("%lld",cnt);
return 0;
}