이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define dbg(x) cerr << #x << ": " << x << endl;
ll find_maximum(int k, vector<vector<int>> x) {
int n = x.size();
int m = x[0].size();
vector<vector<int>> res(n, vector<int>(m, -1));
vector<int> first(n, 0);
vector<int> last(n, m - 1);
ll ans = 0;
for (int t = 0; t < k; ++t) {
vector<int> a(n);
iota(a.begin(), a.end(), 0);
nth_element(a.begin(), a.begin() + n / 2, a.end(), [&](int lhs, int rhs) {
return x[lhs][first[lhs]] + x[lhs][last[lhs]] > x[rhs][first[rhs]] + x[rhs][last[rhs]];
});
for (int i = 0; i < n / 2; ++i) {
res[a[i]][last[a[i]]] = t;
ans += x[a[i]][last[a[i]]];
--last[a[i]];
}
for (int i = n / 2; i < n; ++i) {
res[a[i]][first[a[i]]] = t;
ans -= x[a[i]][first[a[i]]];
++first[a[i]];
}
}
allocate_tickets(res);
return ans;
}
// int main() {
// int n, m, k;
// cin >> n >> m >> k;
// vector<vector<int>> a(n, vector<int>(m));
// for (int i = 0; i < n; ++i) {
// for (int j = 0; j < m; ++j) {
// cin >> a[i][j];
// }
// }
// cout << find_maximum(k, a);
// }
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