Submission #601294

#	Time	Username	Problem	Language	Result	Execution time	Memory
601294		definitelynotmee	Carnival Tickets (IOI20_tickets)	C++17	100 / 100	1169 ms	187508 KiB

tickets

#include "tickets.h"
#include <vector>
#include<bits/stdc++.h>
#define mp make_pair
#define mt make_tuple
#define all(x) x.begin(), x.end()
#define ff first
#define ss second
using namespace std;
template <typename T>
using matrix = vector<vector<T>>;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
const ll INFL = (1LL<<62)-1;
const int INF = (1<<30)-1;
const double EPS = 1e-7;
const int MOD = 1e9 + 7;
const int RANDOM = chrono::high_resolution_clock::now().time_since_epoch().count();
const int MAXN = 1e6+1;

long long find_maximum(int k, std::vector<std::vector<int>> x) {
	int n = x.size();
	int m = x[0].size();
	matrix<int> group(n,vector<int>(m,-1));

	ll resp = 0;
    vector<int> minuscount(n,k);
    priority_queue<pii> pq;

    for(int i = 0; i < n; i++){
        for(int j = 0; j < k; j++){
            resp-=x[i][j];
            pq.push({x[i][j]+x[i][m+j-k],i});
        }
    }


    for(int i = 0; i < n*k/2; i++){
        pii cur = pq.top();
        pq.pop();
        resp+=cur.ff;
        minuscount[cur.ss]--;
    }

    vector<pii> minus, plus;
    minus.reserve(n*k/2);
    plus.reserve(n*k/2);

    for(int i = 0; i < n; i++){
        for(int j = 0; j < minuscount[i]; j++){
            minus.push_back({i,j});
        }
        for(int j = m-1; j >= m-(k-minuscount[i]); j--){
            plus.push_back({i,j});
        }
    }


    vector<set<int>> occupy(k);
    vector<int> curid(n);
    int id = 0;

    for(pii i : plus){
        occupy[id].insert(i.ff);
        group[i.ff][i.ss] = id;
        id = (id+1)%k;
    }

    for(pii i : minus){
        while(!(occupy[curid[i.ff]].size() < n && !occupy[curid[i.ff]].count(i.ff))){
            curid[i.ff]++;
            //assert(curid[i.ff] < k); 
        }
        occupy[curid[i.ff]].insert(i.ff);
        group[i.ff][i.ss] = curid[i.ff];
        curid[i.ff]++;
    }
    





    allocate_tickets(group);
	return resp;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:73:44: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   73 |         while(!(occupy[curid[i.ff]].size() < n && !occupy[curid[i.ff]].count(i.ff))){
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~

• Subtask 1: 11 / 11
• Subtask 2: 16 / 16
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 12 / 12
• Subtask 6: 23 / 23
• Subtask 7: 10 / 10