00.cpp

#include "iostream"
#include "vector"
using namespace std;

int main(){
  int input;
  int inputs;
  bool existence = false;
  vector<int> values;

  cin>>input;
  while(cin>>inputs){
    values.push_back(inputs);
  };

  for(int i=0; i<values.size(); i++){
    if(input == values[i]){
      existence = true;
        break;
    }
  }
  if(existence)
    cout<<"exist"<<endl;
  else
    cout<<"not exist"<<endl;
  return 0;
}