Submission #846119

#	Time	Username	Problem	Language	Result	Execution time	Memory
846119		math_rabbit_1028	Longest Trip (IOI23_longesttrip)	C++17	30 / 100	807 ms	2132 KiB

longesttrip

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

int n;
vector<int> adj[256];
vector<int> res;

vector<int> longest_trip(int N, int D) {
    n = N; 
    res.clear();
    for (int i = 0; i < n; i++) adj[i].clear();
    for (int i = 0; i < n; i++) {
        for (int j = i + 1; j < n; j++) {
            if (are_connected({i}, {j})) {
                adj[i].push_back(j);
                adj[j].push_back(i);
            }
        }
    }

    res.push_back(0);
    while (true) {
        int bef = res.size();
        for (int i = 0; i < adj[res.back()].size(); i++) {
            int v = adj[res.back()][i];
            bool f = false;
            for (int j = 0; j < res.size(); j++) {
                if (res[j] == v) f = true;
            }
            if (f) continue;
            res.push_back(v);
            break;
        }
        if (bef == res.size()) break;
    }
    for (int i = 0; i < adj[res.back()].size(); i++) {
        int v = adj[res.back()][i];
        bool f = false;
        for (int j = 0; j < res.size(); j++) {
            if (res[j] == v) f = true;
        }
        if (f) continue;
        res.insert(res.begin(), v);
        break;
    }

    if (res.size() >= n - res.size()) { 
        return res;
    }

    vector<int> temp;
    for (int i = 0; i < n; i++) {
        bool f = false;
        for (int j = 0; j < res.size(); j++) {
            if (res[j] == i) f = true;
        }
        if (f) continue;
        temp.push_back(i);
    }
    return temp;
}

Compilation message (stderr)

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:25:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |         for (int i = 0; i < adj[res.back()].size(); i++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~~~~~
longesttrip.cpp:28:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |             for (int j = 0; j < res.size(); j++) {
      |                             ~~^~~~~~~~~~~~
longesttrip.cpp:35:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         if (bef == res.size()) break;
      |             ~~~~^~~~~~~~~~~~~
longesttrip.cpp:37:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for (int i = 0; i < adj[res.back()].size(); i++) {
      |                     ~~^~~~~~~~~~~~~~~~~~~~~~~~
longesttrip.cpp:40:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for (int j = 0; j < res.size(); j++) {
      |                         ~~^~~~~~~~~~~~
longesttrip.cpp:55:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |         for (int j = 0; j < res.size(); j++) {
      |                         ~~^~~~~~~~~~~~

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