1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
//created by Albert Mosialek
#include<bits/stdc++.h>
using namespace std;
int chosen=2020;
int main()
{
    ios_base::sync_with_stdio(0);
    int n, k, a;
    cin>>n>>k;
    for(int i =1;i<=n;i++)
        for(int j=1;j<=i;j++)
        {
            cin>>a;
        //    cerr<<i<<" "<<j<<" "<<(i-(j-1))*j<<" "<<chosen<<" "<<a<<endl;
            if((i-(j-1))*j<=k and chosen>a)
                chosen=a;
        }
    cout<<chosen<<endl;
    return 0;
}