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#include<iostream>
using namespace std;
int main(void)
{
    int t;
    cin>>t;
    int i = 1;
    int n,m;
    while(i <= t)
    {
        cin>>n>>m;
        cout<<endl;
        int k[100];
        for(int j = 0;j < n; j++)
        {
            cin>>k[j];
        }
        cout<<endl;
        if(m>=n)
        {
            cout<<100<<endl;
        }
        else
        {
            cout<<k[m]-1<<endl;
        
        }
    }
    return 0;
}
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