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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. vector<char>s;
  7. for (auto &x: s) cin >> x;
  8. for (int i=0; i<s.size(); i++) {
  9. if (s[i]=='+') {
  10. s.erase(s.begin()+ i);
  11. }
  12.  
  13. } for (auto x : s) cout << x << " ";
  14.  
  15. }
Success #stdin #stdout 0s 5320KB
stdin
1+2+3
stdout
Standard output is empty