#include "tickets.h"
#include <vector>
#include <bits/stdc++.h>
using i64 = long long;
long long find_maximum(int k, std::vector<std::vector<int>> x) {
int n = x.size();
int m = x[0].size();
std::vector pre(n, std::vector<i64>(m + 1));
for (int i = 0; i < n; i++) {
for (int j = 1; j <= m; j++) {
pre[i][j] = pre[i][j - 1] + x[i][j - 1];
}
}
i64 S = 0;
std::vector<int> l(n, 0), r(n, m - 1);
std::vector ans(n, std::vector<int>(m, -1));
for (int round = 0; round < k; round++) {
for (int i = 0; i < n; i++) {
ans[i][l[i]] = round;
S -= x[i][l[i]++];
}
std::vector<int> ord(n);
iota(ord.begin(), ord.end(), 0);
std::sort(ord.begin(), ord.end(), [&](int i, int j) {
return pre[i][r[i] + 1] - pre[i][l[i] - 1] > pre[j][r[j] + 1] - pre[j][l[j] - 1];
});
ord.resize(n / 2);
for (int i : ord) {
S += x[i][--l[i]] + x[i][r[i]];
ans[i][l[i]] = -1;
ans[i][r[i]--] = round;
}
}
allocate_tickets(ans);
return S;
}
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