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- #include <iostream>
- #include <unordered_set>
- using namespace std;
- int main(){
- int n;
- cin>>n;
- long long a, b, c;
- cin>>a>>b>>c;
- unordered_set <long long> ans;
- for (int i=0; i<=n; i++){
- for (int j=0; j<=n-i; j++){
- long long h=i*a+j*b+c*(n-i-j);
- ans.insert(h);
- }
- }
- cout<<ans.size()<<endl;
- }
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