1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
#include <bits/stdc++.h>
using namespace std;
vector <vector <pair<int,int>>> v;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, k;
    cin>>n>>k;
    v.resize(n+1);

    for(int i=1; i<=n; i++)
    {
        int x, odl=i-2;
        v[i].resize(i+1);
        for(int j=1; j<=i; j++)
        {
            cin>>x;
            if(j==1) v[i][j]={x, i};
            else if(j==i) v[i][j]={x, i};
            else if(j==i/2+1 && i%2!=0)
            {
                int tfu=v[i][j-1].second+1;
                v[i][j]={x,tfu};
            }
            else
            {
                int tfu=v[i][j-1].second+odl;
                if(j>i/2 && i%2==0) v[i][j]={x, v[i][j-i/2+1].second};
                else if(j>i/2 && i%2==1) v[i][j]={x, v[i][j-i/2].second};

                else v[i][j]={x,tfu};
                odl-=2;
            }
        }
    }

    int ans=30000;
    for(int i=1; i<=n; i++)
    {
        for(int j=1; j<=i; j++)
        {
            if(v[i][j].first<ans && v[i][j].second<=k) ans=v[i][j].first;
            //cout<<v[i][j].first<<":"<<v[i][j].second<<" ";
        }
        //cout<<endl;
    }
    cout<<ans;

    return 0;
}