Gfrktyl

Qn - Why am i getting yes for all the test cases given in the problem? One more thing if t=1 and if I check the test cases it gives the correct answer, why? Please I am not that much efficient in programming. Any help would be appreciated.

Link to the problem - https://www.codechef.com/problems/TRUEDARE

My attempt -

#include<bits/stdc++.h>

using namespace std;

int main()

{

    vector<int>::iterator it;

    vector <int> vrt;

    vector <int> vrd;

    vector <int> vst;

    vector <int> vsd;



    int t,rt,rd,st,sd,x,i;

    bool flag;



    cin>>t;

    while(t--)

    {

     flag=1;

     cin>>rt;

     for(i=0;i<rt;i++)

     {

     cin>>x;

     vrt.push_back(x);

     }



     cin>>rd;

     for(i=0;i<rd;i++)

     {

     cin>>x;

     vrd.push_back(x);

     }



     cin>>st;

     for(i=0;i<st;i++)

     {

     cin>>x;

     vst.push_back(x);

     }



     cin>>sd;

     for(i=0;i<sd;i++)

     {

     cin>>x;

     vsd.push_back(x);

     }



    for(i=0;i<st;i++)

    {

     it=find(vrt.begin(),vrt.end(),vst.at(i));

     if(it != vrt.end()){}

     else

        {

         flag=0;

         break;

        }

    }



    if(flag)

    for(i=0;i<sd;i++)

    {

     it=find(vrd.begin(),vrd.end(),vsd.at(i));

     if(it != vrd.end()){}

     else

       {

         flag=0;

         break;

        }

    }



   cout<<(flag?"yesn":"non");

    }

}