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- #include <bits/stdc++.h>
- using namespace std;
- int main(){
- long long int n,m,k,l;
- cin>>n>>m>>k>>l;
- long long int odp=ceil((k+l)/m);
- long long int test=odp*m<=n?odp:-1;
- cout<<test;
- return 0;
- }
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