// I can do all things through Christ who strengthens me
// Philippians 4:13
#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;
#define REP(i, j, k) for (int i = j; i < (k); i++)
#define RREP(i, j, k) for (int i = j; i >= (k); i--)
template <class T>
inline bool mnto(T &a, const T b) {return a > b ? a = b, 1 : 0;}
template <class T>
inline bool mxto(T &a, const T b) {return a < b ? a = b, 1 : 0;}
typedef long long ll;
typedef long double ld;
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
#define ALL(x) x.begin(), x.end()
#define SZ(x) (int) x.size()
#define pb push_back
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<ii> vii;
typedef tuple<int, int, int> iii;
typedef vector<iii> viii;
#ifndef DEBUG
#define cerr if (0) cerr
#endif
const int INF = 1000000005;
const ll LINF = 1000000000000000005;
const int MAXN = 1505;
int n, m, k;
vector<vi> x, s;
vi grp[MAXN][2];
ll ans;
int l[MAXN], r[MAXN];
priority_queue<ii> pq;
ll find_maximum(int _k, vector<vi> _x) {
k = _k; x = _x;
n = SZ(x); m = SZ(x[0]);
s = vector<vi>(n, vi(m, -1));
viii vx;
REP (i, 0, n) {
r[i] = m - k;
l[i] = 0;
REP (j, m - k, m) {
ans += x[i][j];
}
pq.push({-x[i][r[i]] - x[i][l[i]], i});
}
REP (z, 0, n / 2 * k) {
auto [v, i] = pq.top(); pq.pop();
ans += v;
r[i]++; l[i]++;
if (r[i] != m) {
pq.push({-x[i][r[i]] - x[i][l[i]], i});
}
}
REP (i, 0, n) {
REP (j, 0, l[i]) {
grp[i][0].pb(j);
}
REP (j, r[i], m) {
grp[i][1].pb(j);
}
}
REP (z, 0, k) {
int cnt[2] = {0, 0};
REP (i, 0, n) {
if (grp[i][0].empty()) {
cnt[1]++;
int j = grp[i][1].back(); grp[i][1].pop_back();
s[i][j] = z;
} else if (grp[i][1].empty()) {
cnt[0]++;
int j = grp[i][0].back(); grp[i][0].pop_back();
s[i][j] = z;
}
}
REP (i, 0, n) {
if (grp[i][0].empty() || grp[i][1].empty()) {
continue;
}
REP (l, 0, 2) {
if (cnt[l] == n / 2) {
continue;
}
cnt[l]++;
int j = grp[i][l].back(); grp[i][l].pop_back();
s[i][j] = z;
break;
}
}
}
allocate_tickets(s);
return ans;
}
