// :)^2
#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
#define fi first
#define se second
#define mp make_pair
#define pb push_back
typedef long long ll;
const int maxn5 = 2e3 + 10;
pair <ll, int> per[maxn5];
int ptl[maxn5], ptr[maxn5];
vector <int> req[maxn5][2];
long long find_maximum(int k, std::vector<std::vector<int>> x) {
int n = x.size();
int m = x[0].size();
std::vector<std::vector<int>> ret;
for (int i = 0; i < n; i++) {
ptl[i] = 0;
ptr[i] = m - 1;
vector <int> row(m);
fill(all(row), -1);
ret.push_back(row);
}
ll ans = 0;
int num = 0;
while(k--){
for(int i = 0; i < n; i++)
per[i] = {ll(x[i][ptl[i]]) + x[i][ptr[i]], i};
sort(per, per + n);
for(int i = 0; i < n / 2; i++){
int v = per[i].se;
ans -= x[v][ptl[v]];
ret[v][ptl[v]] = num;
ptl[v]++;
}
for(int i = n / 2; i < n; i++){
int v = per[i].se;
ans += x[v][ptr[v]];
ret[v][ptr[v]] = num;
ptr[v]--;
}
num++;
}
allocate_tickets(ret);
return ans;
}
