Cod sursa(job #2554591)
| Utilizator |  David Stefan Teaca david.teaca |
Data | 23 februarie 2020 10:23:22 |
|---|---|---|---|
| Problema | Divk | Scor | 100 |
| Compilator | cpp-64 | Status | done |
| Runda | Arhiva de probleme | Marime | 0.28 kb |
#include <fstream>
using namespace std;ifstream r("divk.in");ofstream w("divk.out");int v[500001],f[99999];int main(){int n,a,b,k;long long cnt=0;r>>n>>k>>a>>b;for(int i=1;i<=n;i++){int x;r>>x;v[i]=(v[i-1]+x)%k;if(i>=a)f[v[i-a]]++;if(i>b)f[v[i-b-1]]--;cnt+=f[v[i]];}w<<cnt;return 0;}