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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4.  
  5. int main()  {
  6.   int a , b , c ,n;
  7.   cin >>a >> b >> c >> n;
  8.   if(c <=min(a,b) && a+b-c < n){
  9.        cout << n - a - b +c;
  10.   }else{
  11.        puts("-1");
  12.   }
  13.   return 0;
  14. }
Success #stdin #stdout 0s 4572KB
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stdin
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3 3 3 0
stdout
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-1
https://ideone.com/ygom3q
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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