Submission #580032

#	Time	Username	Problem	Language	Result	Execution time	Memory
580032		slime	Carnival Tickets (IOI20_tickets)	C++14	11 / 100	1 ms	724 KiB

tickets

#include "bits/stdc++.h"
#include "tickets.h"
using namespace std;

long long find_maximum(int k, std::vector<std::vector<int>> d);
void allocate_tickets( std::vector<std::vector<int>> _x);


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>> answer;
	for (int i = 0; i < n; i++) {
		std::vector<int> row(m);
		for (int j = 0; j < m; j++) {
			row[j] = -1;
		}
		answer.push_back(row);
	}
  vector<pair<int, int> > v;
  for(int i=0; i<n; i++) {
    for(int j=0; j<m; j++) {
      v.push_back({x[i][j], i});
    }
  }
  sort(v.begin(), v.end());
  int cnt[n];
  for(int i=0; i<n; i++) cnt[i] = 0;
  int distinct = 0;
  long long s = 0;
  for(int i=0; i<v.size(); i++) {
    cnt[v[i].second]++;
    if(cnt[v[i].second] == 1) distinct++;
    if(distinct == n/2) {
      int b = v[i].first;
      int sad[n];
      for(int j = v.size()-1; j >= 0; j--) {
        if(cnt[v[j].second] == 0) {
          cnt[v[j].second] = -1;
          s += v[j].first - b;
          sad[v[j].second] = v[j].first;
        }
      }
      for(int j=i; j>=0; j--) {
        if(cnt[v[j].second] > 0) {
          cnt[v[j].second] = -1;
          s += b - v[j].first;
          sad[v[j].second] = v[j].first;
        }
      }
      for(int j=0; j<n; j++) {
        for(int l=0; l<m; l++) {
          if(x[j][l] == sad[j]) {
            answer[j][l] = 0; break;
          }
        }
      }
      break;
    }
  }
	allocate_tickets(answer);
	return s;
}
//13210230

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:31:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |   for(int i=0; i<v.size(); i++) {
      |                ~^~~~~~~~~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 16
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10