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Cod sursa(job #43783)
#include<fstream.h>
long n, k, a, b, contor;
long long s, v[1000];
void citire()
{
ifstream in("divk.in");
in>>n>>k>>a>>b;
for (int i=1; i<=n; i++)
in>>v[i];
in.close();
}
void parc()
{
long i, j, d, l;
d=b-a+1;
for (i=1; i<n; i++)
{
s=0;
l=0;
for (j=i; j<=n; j++)
{
s+=v[j];
l++;
if (s%k==0 && l<=d) contor++;
if (l>d) break;
}
}
ofstream out("divk.out");
out<<contor;
out.close();
}
int main()
{
citire();
parc();
return 0;
}