#include "tickets.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;
long long func(vector<int> a) {
sort(a.begin(), a.end());
long long ans = 0;
for (int i = 0; i < (int)a.size(); i++) {
ans += (i * 2 < (int)a.size() ? -1 : +1) * a[i];
}
return ans;
}
long long find_maximum(int k, vector<vector<int>> x) {
int n = x.size();
int m = x[0].size();
vector<vector<int>> answer(n, vector<int>(m, -1));
vector<int> l(n, 0), r(n, m - 1);
long long ans = 0;
for (int iter = 0; iter < k; iter++) {
vector<bool> t(n, false);
long long val = 0;
vector<int> ord(n);
for (int i = 0; i < n; i++) {
val += -x[i][l[i]];
ord[i] = i;
}
sort(ord.begin(), ord.end(), [&](int a, int b) {
return (x[a][l[a]] + x[a][r[a]]) > (x[b][l[b]] + x[b][r[b]]);
});
for (int i = 0; i * 2 < n; i++) {
int j = ord[i];
val += x[j][l[j]] + x[j][r[j]];
t[j] = true;
}
ans += val;
for (int i = 0; i < n; i++) {
if (t[i]) {
answer[i][r[i]] = iter;
r[i]--;
} else {
answer[i][l[i]] = iter;
l[i]++;
}
}
}
allocate_tickets(answer);
return ans;
}
