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
#include <bits/stdc++.h>
using namespace std;



int main() {
    ios_base::sync_with_stdio(0);
    int n, k;
    cin >> n >> k;
    vector < vector <int> > butelki(n, vector <int>(n));
    for (int i = 0; i < n; i++) {
        for (int j = 0; j <= i; j++) {
            cin >> butelki[i][j];
        }
    }
    
    vector <vector <int> > ile(n, vector <int>(n+1));

    for (int r = 0; r < n; r++) {
        for (int k = 0; k <= r; k++) {
            ile[r][k] = (r - k + 1)*(k+1);
        }
    }

    int mini = 2020;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j <= i; j++) {
            if (ile[i][j] <= k) {
                mini = min(mini, butelki[i][j]);
            }
        }
    }
    cout << mini << "\n";
    return 0;
}