977C Codeforces - Less or Equal

977C Codeforces - Less or Equal

Solution in  c++

#include <bits/stdc++.h>

using namespace std;

int n,m,cnt=1;

int main()

{

    cin>>n>>m;

    int nn[n];

    for(int i=0;i<n;i++)

    cin>>nn[i];

    sort(nn,nn+n);

    cnt=m;

    if(m==0 && nn[0]>1){cout<<1;return 0;}

    else if(m==0 && nn[0]==1) {cout<<-1;return 0;}

    if(nn[cnt]==nn[cnt-1])

    {cout<<-1;return 0;}

    else cout<<nn[cnt-1];

    return 0;

}

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About Mohamed Sobhi

My name is Mo.Sobhy ,I study at School excelling high school in Ain Shams ,Cairo
My hobbies is programming ,and web development ,playing chess and writing horror stories.