Cod sursa(job #2508894)
Utilizator | Florin Gheorghe cyg_SerbanB | Data | 13 decembrie 2019 12:43:31 |
---|---|---|---|
Problema | Divk | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.47 kb |
#include <cstdio>
using namespace std;
int sp[500005],cnt[100005];
int main()
{
freopen("divk.in","r",stdin);
freopen("divk.out","w",stdout);
int n,i,x,k,a,b;
long long ans=0;
scanf("%d%d%d%d",&n,&k,&a,&b);
for(i=1;i<=n;++i)
{
scanf("%d",&x);
sp[i]=(sp[i-1]+x)%k;
if(i>b)
cnt[sp[i-b-1]]--;
if(i>=a)
cnt[sp[i-a]]++;
ans=ans+1LL*cnt[sp[i]];
}
printf("%lld",ans);
return 0;
}