Submission #399981

#	Time	Username	Problem	Language	Result	Execution time	Memory
399981		faresbasbs	Carnival Tickets (IOI20_tickets)	C++14	0 / 100	1 ms	204 KiB

tickets

#include <bits/stdc++.h>
#include "tickets.h"
using namespace std;
int n,m,l[1501],r[1501];

long long find_maximum(int k, vector<vector<int>> x){
	n = x.size() , m = x[0].size();
	vector<pair<long long,long long>> v,vals;
	for(int i = 0 ; i < n ; i += 1){
		l[i] = 0 , r[i] = m-1;
		vals.push_back({0,i});
		for(int j = 0 ; j < m ; j += 1){
			v.push_back({x[i][j],i});
		}
	}
	sort(v.begin(),v.end());
	vector<vector<int>> ans(n,vector<int>(m,-1));
	long long ret = 0;
	for(int i = 0 ; i < v.size()/2 ; i += 1){
		ret -= v[i].first;
	}
	for(int i = v.size()/2 ; i < v.size() ; i += 1){
		ret += v[i].first;
		vals[v[i].second].first += 1;
	}
	for(int i = 0 ; i < k ; i += 1){
		sort(vals.begin(),vals.end());
		for(int j = 0 ; j < n/2 ; j += 1){
			int p = vals[j].second;
			// ans[p][l[p]] = i;
			l[p] += 1;
		}
		for(int j = n/2 ; j < n ; j += 1){
			int p = vals[j].second;
			// ans[p][r[p]] = i;
			r[p] -= 1;
			v[j].first -= 1;
		}
	}
	allocate_tickets(ans);
	return ret;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:19:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |  for(int i = 0 ; i < v.size()/2 ; i += 1){
      |                  ~~^~~~~~~~~~~~
tickets.cpp:22:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |  for(int i = v.size()/2 ; i < v.size() ; i += 1){
      |                           ~~^~~~~~~~~~

• Subtask 1: 0 / 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