Submission #625317

#	Time	Username	Problem	Language	Result	Execution time	Memory
625317		Trunkty	Carnival Tickets (IOI20_tickets)	C++14	14 / 100	685 ms	101712 KiB

tickets

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
using namespace std;
typedef long long ll;
//#define ll ll;

#include "tickets.h"

ll pick[1505][1505];
vector<ll> zero[1505],one[1505];

ll find_maximum(int k, vector<vector<int>> x) {
	ll n = x.size();
	ll m = x[0].size();
	ll ret=0;
	vector<vector<ll>> v;
	for(ll i=0;i<n;i++){
		for(ll j=0;j<m;j++){
			if(x[i][j]==0){
				zero[i].push_back(j);
			}
			else{
				one[i].push_back(j);
			}
		}
		v.push_back({zero[i].size(),i});
	}
	for(ll i=1;i<=k;i++){
		sort(v.begin(),v.end());
		ll cntz=0,cnto=0;
		for(ll j=0;j<n/2;j++){
			ll p = v[j][1];
			if(one[p].size()>0){
				cnto++;
				pick[p][one[p].back()] = i;
				one[p].pop_back();
			}
			else{
				cntz++;
				pick[p][zero[p].back()] = i;
				zero[p].pop_back();
			}
		}
		for(ll j=n/2;j<n;j++){
			ll p = v[j][1];
			if(zero[p].size()>0){
				cntz++;
				pick[p][zero[p].back()] = i;
				zero[p].pop_back();
			}
			else{
				cnto++;
				pick[p][one[p].back()] = i;
				one[p].pop_back();
			}
		}
		ret += min(cntz,cnto);
		v.clear();
		for(ll j=0;j<n;j++){
			v.push_back({zero[j].size(),j});
		}
	}
	//
	vector<vector<int>> answer;
	for(ll i=0;i<n;i++) {
		vector<int> row(m);
		for(ll j=0;j<m;j++) {
			row[j] = pick[i][j]-1;
		}
		answer.push_back(row);
	}
	allocate_tickets(answer);
	return ret;
}

Compilation message (stderr)

tickets.cpp: In function 'll find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:28:28: warning: narrowing conversion of 'zero[i].std::vector<long long int>::size()' from 'std::vector<long long int>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing]
   28 |   v.push_back({zero[i].size(),i});
      |                ~~~~~~~~~~~~^~
tickets.cpp:28:28: warning: narrowing conversion of 'zero[i].std::vector<long long int>::size()' from 'std::vector<long long int>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing]
tickets.cpp:62:29: warning: narrowing conversion of 'zero[j].std::vector<long long int>::size()' from 'std::vector<long long int>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing]
   62 |    v.push_back({zero[j].size(),j});
      |                 ~~~~~~~~~~~~^~
tickets.cpp:62:29: warning: narrowing conversion of 'zero[j].std::vector<long long int>::size()' from 'std::vector<long long int>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing]

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