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Sets-STL

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335 Discussions

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  • ernprivado
     + 0 comments
    int q;
cin>>q;``
while(q>0)
{
    int y, x;
    cin>>y>>x;
    if(y==1){qX.insert(x);}
    if(y==2){qX.erase(x);}
    if(y==3){
        auto it = qX.find(x);
        if(it != qX.end()){cout<<"Yes\n";}
        else{cout<<"No\n";}
    }
    q--;}

  • patrickgao2020
     + 0 comments

    Here is my solution!

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


int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int num_queries, query_type, query;
    set<int> ints;
    cin >> num_queries;
    for (int i = 0; i < num_queries; i++) {
        cin >> query_type >> query;
        if (query_type == 1) {
            ints.insert(query);
        } else if (query_type == 2) {
            ints.erase(query);
        } else {
            set<int>::iterator itr = ints.find(query);
            if (itr == ints.end()) {
                cout << "No\n";
            } else {
                cout << "Yes\n";
            }
        }
    }
    return 0;
}

  • dangis_bakutis
     + 0 comments
    #include <iostream>
#include <set>

using namespace std;

int main()
{
    int q;
    cin >> q;

    set<int> set;

    while (q > 0)
    {
        int y, x;
        cin >> y >> x;

        switch (y)
        {
        case 1:
        {
            set.insert(x);
            break;
        }
        case 2:
        {
            set.erase(x);
            break;
        }
        default:
            if (set.end() != set.find(x))
                cout << "Yes" << endl;
            else
                cout << "No" << endl;
            break;
        }

        q--;
    }
}

  • akshaykandasamy1
     + 0 comments

    int main() { set s; int q; int a; int y; cin>>q; while(q>0){ cin>>a; if(a==1){ cin>>y;

            s.insert(y);
    }
    else if(a==2){
        cin>>y;
        auto it=s.find(y);
        if(it!=s.end()){
            s.erase(*it);
        }
        else{
            continue;
        }
    }
    else if(a==3){
        cin>>y;
        auto itr=s.find(y);
        if(itr!=s.end()){
            cout<<"Yes"<<endl;
        }
        else{
            cout<<"No"<<endl;
        }

    }
    q--;
}  
return 0;

    }

  • yashdeora98294
     + 0 comments

    Here is Sets-STL problem solution in C++ - https://programmingoneonone.com/hackerrank-sets-stl-solution-in-cpp.html