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 | #include <cstdio>
int main() {
int n, k, a, x, min_a = 2019;
scanf("%d %d", &n, &k);
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
scanf("%d", &a);
if (a >= min_a) {
continue;
}
x = i * (i + 1);
x -= (j - 1) * j;
x -= (i - j) * (i - j + 1);
x /= 2;
if (x <= k) {
min_a = a;
}
}
}
printf("%d\n", min_a);
return 0;
}
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