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Sets-STL Hackerrank Solution in C++

 Sets-STL Hackerrank Solution in C++

For Explanation Watch Video::



Sample Input

8
1 9
1 6
1 10
1 4
3 6
3 14
2 6
3 6

Sample Output

Yes
No
No
Code:

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <set>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */ 
    set<int>s;
    int q;
    cin>>q;
    for(int i=0;i<q;i++){
        int val;
        cin>>val;
        if(val==1){
            int x;
            cin>>x;
            s.insert(x);
        }else if(val==2){
            int val;
            cin>>val;
            s.erase(val);
        }else{
            int val;
            cin>>val;
            auto it = s.find(val);
            if(it!=s.end()){
                cout<<"Yes"<<endl;
            }else{
                cout<<"No"<<endl;
            }
        }
    }  
    return 0;
}



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