Submission #1046915

#	Time	Username	Problem	Language	Result	Execution time	Memory
1046915		sonamoo	Longest Trip (IOI23_longesttrip)	C++17	60 / 100	576 ms	856 KiB

longesttrip

#include "longesttrip.h"
#include <bits/stdc++.h>

using namespace std;

vector<int> ans , ans2;
int vis[260];
int graph[260][260];

void init() {
    ans.clear();
    ans2.clear();
    memset(graph , 0 , sizeof(graph));
    memset(vis , 0 , sizeof(vis));
}

vector<int> longest_trip(int N, int D) {
    init();

    int here = 0; vis[0]=1;
    ans.push_back(0);
    int prv=-1;
    while(prv!=here) {
        prv=here;
        for (int i = 0; i < N; i++) {
            vector<int> tmp1 , tmp2;
            if (vis[i]==0) {
                tmp1.push_back(i);
                tmp2.push_back(here);
                if (!are_connected(tmp1 , tmp2)) continue;
                ans.push_back(i);
                vis[i]=1;
                here=i;
                break;
            }
        }
    }

    if (D == 2) {
        if (ans.size() == N) return ans;

        reverse(ans.begin() , ans.end());
        for (int i = 0; i < N; i++) if (vis[i]==0) ans.push_back(i);
        return ans;
    }
    if (D == 3) {
        for (int i = 0; i < N; i++) ans2.push_back(i);
        return ans2;
    }

    for (int i = 0; i < N; i++) if (vis[i] == 0) ans2.push_back(i);

    for (int i = 0; i < ans2.size(); i++) {
        vector<int> tmp1 , tmp2;
        tmp1.push_back(ans[0]);
        tmp2.push_back(ans2[i]);
        if (are_connected(tmp1 , tmp2)) {
            vector<int> ANS;
            for (int j = 0; j < ans2.size(); j++) if (j != i) ANS.push_back(ans2[j]);
            ANS.push_back(ans2[i]);
            for (auto t : ans) ANS.push_back(t);
            return ANS;
        }
    }

    for (int i = 1; i < ans.size()-1; i++) {
        for (int j = 0; j < ans2.size(); j++) {
            vector<int> tmp1 , tmp2;
            tmp1.push_back(ans[i]);
            tmp2.push_back(ans2[j]);
            if (are_connected(tmp1 , tmp2)) {
                vector<int> ANS;
                for (int k = 0; k < ans2.size(); k++) if (k != j) ANS.push_back(ans2[k]);
                ANS.push_back(ans2[j]);
                for (int k = i; k < ans.size(); k++) ANS.push_back(ans[k]);
                for (int k = 0; k < i; k++) ANS.push_back(ans[k]);
                return ANS;
            }
        }
    }

    if (ans2.size() < ans.size()) return ans;
    return ans2;
}

Compilation message (stderr)

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:40:24: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   40 |         if (ans.size() == N) return ans;
      |             ~~~~~~~~~~~^~~~
longesttrip.cpp:53:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     for (int i = 0; i < ans2.size(); i++) {
      |                     ~~^~~~~~~~~~~~~
longesttrip.cpp:59:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |             for (int j = 0; j < ans2.size(); j++) if (j != i) ANS.push_back(ans2[j]);
      |                             ~~^~~~~~~~~~~~~
longesttrip.cpp:66:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |     for (int i = 1; i < ans.size()-1; i++) {
      |                     ~~^~~~~~~~~~~~~~
longesttrip.cpp:67:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |         for (int j = 0; j < ans2.size(); j++) {
      |                         ~~^~~~~~~~~~~~~
longesttrip.cpp:73:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |                 for (int k = 0; k < ans2.size(); k++) if (k != j) ANS.push_back(ans2[k]);
      |                                 ~~^~~~~~~~~~~~~
longesttrip.cpp:75:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |                 for (int k = i; k < ans.size(); k++) ANS.push_back(ans[k]);
      |                                 ~~^~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 25 / 25
• Subtask 4: 19.999999998 / 60