제출 #939787

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
939787		jamjanek	가장 긴 여행 (IOI23_longesttrip)	C++17	0 / 100	0 ms	344 KiB

longesttrip

#include "longesttrip.h"
#include<bits/stdc++.h>
using namespace std;
bool czy[300];
vector<int>prefix(vector<int>A, int ile){
    while(A.size()>ile)A.pop_back();
    return A;
}
vector<int> longest_trip(int n, int d)
{
	int i;
	vector<int>tab[2];tab[0].push_back(0);tab[1].push_back(1);
	for(i=1;i<n/2;i++){
		int a = i*2, b = i*2+1;
		if(are_connected({a}, {b})){
			if(are_connected({a}, {tab[0].back()})){
				tab[0].push_back(a);
				tab[0].push_back(b);
			}
			else if(are_connected({a}, {tab[1].back()})){
				tab[1].push_back(a);
				tab[1].push_back(b);				
			}
			else{
				while(tab[1].size()){
					tab[0].push_back(tab[1].back());
					tab[1].pop_back();
				}
				tab[1].push_back(a);
				tab[1].push_back(b);
			}
		}
		else{
			if(are_connected({a}, {tab[0].back()})){
				tab[0].push_back(a);
				if(are_connected({b}, {tab[1].back()}))
					tab[1].push_back({b});
				else{
					while(tab[1].size()){
						tab[0].push_back(tab[1].back());
						tab[1].pop_back();
					}
					tab[1].push_back(b);
				}
			}
			else{
				tab[0].push_back(b);
				if(are_connected({a}, {tab[1].back()}))
					tab[1].push_back({a});
				else{
					while(tab[1].size()){
						tab[0].push_back(tab[1].back());
						tab[1].pop_back();
					}
					tab[1].push_back(a);
				}
			}
		}
	}
	if(n%2){
		if(are_connected({n-1}, {tab[0].back()}))
			tab[0].push_back(n-1);
		else if(are_connected({n-1}, {tab[1].back()}))
			tab[1].push_back(n-1);
		else{
			while(tab[1].size()){
				tab[0].push_back(tab[1].back());
				tab[1].pop_back();
			}
			tab[1].push_back(n-1);			
		}
	}
	
	if(!are_connected(tab[0], tab[1])){
    	if(tab[0].size()>=tab[1].size())return tab[0];
    	return tab[1];
	}
	int pocz=0, kon = tab[0].size(), srodek;
	while(pocz<kon){
	    srodek = (pocz+kon)/2;
	    if(are_connected(prefix(tab[0], srodek), tab[1]))
	        kon = srodek;
	   else
	        pocz = srodek+1;
	}
	vector<int>pom;
	for(i=kon;i<tab[0].size();i++)
	    pom.push_back(tab[0][i]);
	for(i=0;i<kon;i++)
	    pom.push_back(tab[0][i]);
    tab[0] = pom;
    
	pocz=0, kon = tab[1].size(), srodek;
	while(pocz<kon){
	    srodek = (pocz+kon)/2;
	    if(are_connected(prefix(tab[1], srodek), tab[0]))
	        kon = srodek;
	   else
	        pocz = srodek+1;
	}
	pom.clear();
	for(i=kon;i<tab[1].size();i++)
	    pom.push_back(tab[1][i]);
	for(i=0;i<kon;i++)
	    pom.push_back(tab[1][i]);
    tab[1] = pom;
	while(tab[1].size()){
	    tab[0].push_back(tab[1].back());
	    tab[1].pop_back();
	}
	return tab[0];
}

컴파일 시 표준 에러 (stderr) 메시지

longesttrip.cpp: In function 'std::vector<int> prefix(std::vector<int>, int)':
longesttrip.cpp:6:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
    6 |     while(A.size()>ile)A.pop_back();
      |           ~~~~~~~~^~~~
longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:87:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   87 |  for(i=kon;i<tab[0].size();i++)
      |            ~^~~~~~~~~~~~~~
longesttrip.cpp:93:37: warning: right operand of comma operator has no effect [-Wunused-value]
   93 |  pocz=0, kon = tab[1].size(), srodek;
      |                                     ^
longesttrip.cpp:102:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  102 |  for(i=kon;i<tab[1].size();i++)
      |            ~^~~~~~~~~~~~~~

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