1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | #include <bits/stdc++.h>
using namespace std;
int main() {
int n, k;
cin >> n >> k;
int res = 1e9;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
int above = i * (i + 1) / 2;
above -= (j - 1) * j / 2;
above -= (i - j) * (i - j + 1) / 2;
int a;
cin >> a;
if (above <= k) {
res = min(res, a);
}
}
}
cout << res << endl;
}
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