Freezing output screen in VSCode after entering -1

The program is about LONGEST SUBSEQUENCE. I tried to give input until -1 is occurred but the output console is getting hanged after I enter -1. I tried running it on online compilers too...but still no solution.

Here is the output screenshot in VSCode

#include <iostream>  #include <bits/stdc++.h>  using namespace std;    int main()  {      vector<int> v;      unordered_set<int> s;      int count, res = 0;      cout << "Enter the elements of the array: ";      while (1)      {          cin >> count;          if (count == -1)              break;          v.push_back(count);          s.insert(count);      }        for (int i = 0; i != v.size(); i++)      {          if (s.find(v.at(i) - 1) != s.end())          {              count = 1;              while (s.find(v[i] + 1) != s.end())                  count++;              res = max(res, count);          }      }        cout << res;        return 0;  }  

https://stackoverflow.com/questions/65876069/freezing-output-screen-in-vscode-after-entering-1 January 25, 2021 at 05:17AM