Submission #853586

#	Time	Username	Problem	Language	Result	Execution time	Memory
853586		Andrey	Longest Trip (IOI23_longesttrip)	C++17	15 / 100	773 ms	1176 KiB

longesttrip

#include "longesttrip.h"
#include<bits/stdc++.h>
using namespace std;

bool haha[1000][1000];

vector<int> longest_trip(int n, int d)
{
    for(int i = 0; i < n; i++) {
        haha[i][i] = false;
        for(int j = i+1; j < n; j++) {
            bool c = are_connected({i},{j});
            haha[i][j] = c;
            haha[j][i] = c;
        }
    }
    vector<bool> bruh(n,true);
    deque<int> ans;
    ans.push_back(0);
    bruh[0] = false;
    for(int i = 1; i < n; i++) {
        if(haha[0][i]) {
            ans.push_back(i);
            bruh[i] = false;
            break;
        }
    }
    for(int i = 2; i < n; i++) {
        int p;
        for(int j = 0; j < n; j++) {
            if(bruh[j]) {
                p = j;
            }
        }
        int a = ans[0],b = ans[ans.size()-1];
        if(haha[a][p]) {
            ans.push_front(p);
            bruh[p] = false;
        }
        else if(haha[b][p]) {
            ans.push_back(p);
            bruh[p] = false;
        }
        else {
            int c = -1;
            for(int j = 0; j < n; j++) {
                for(int y = 0; y < n; y++) {
                    if(bruh[j] == false && bruh[y] == true && haha[j][y]) {
                        c = y;
                    }
                }
            }
            if(c == -1) {
                break;
            }
            ans.push_back(c);
            bruh[c] = false;
        }
    }
    vector<int> wut(0);
    for(int i = 0; i < ans.size(); i++) {
        wut.push_back(ans[i]);
    }
    if(ans.size() == n) {
        return wut;
    }
    else {
        if(ans.size() < n-ans.size()) {
            wut.clear();
            for(int i = 0; i < n; i++) {
                if(bruh[i]) {
                    wut.push_back(i);
                }
            }
        }
    }
    return wut;
}

Compilation message (stderr)

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:61:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |     for(int i = 0; i < ans.size(); i++) {
      |                    ~~^~~~~~~~~~~~
longesttrip.cpp:64:19: warning: comparison of integer expressions of different signedness: 'std::deque<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   64 |     if(ans.size() == n) {
      |        ~~~~~~~~~~~^~~~

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 25
• Subtask 4: 0 / 60