Submission #900605

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
900605	2024-01-08 15:47:15	abcvuitunggio	Longest Trip (IOI23_longesttrip)	C++17	100 / 100	10 ms	1012 KiB

longesttrip

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#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
vector <int> longest_trip(int N, int D){
    vector <int> a,b;
    int idx[N];
    iota(idx,idx+N,0);
    //shuffle(idx,idx+N,default_random_engine(chrono::steady_clock::now().time_since_epoch().count()));
    a.push_back(idx[0]);
    b.push_back(idx[1]);
    int ch=0;
    for (int j=2;j<N;j++){
        int i=idx[j];
        if (are_connected({a.back()},{i})){
            a.push_back(i);
            ch=0;
            continue;
        }
        if (ch||are_connected({b.back()},{i})){
            b.push_back(i);
            ch=1;
            continue;
        }
        reverse(b.begin(),b.end());
        for (int i:b)
            a.push_back(i);
        b={i};
    }
    if (a.size()<b.size())
        swap(a,b);
 
 
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Compilation message (stderr)

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:33:31: warning: narrowing conversion of '(a.std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]
   33 |     vector <int> x={0,a.size()-1},y={0,b.size()-1};
      |                       ~~~~~~~~^~
longesttrip.cpp:33:31: warning: narrowing conversion of '(a.std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]
longesttrip.cpp:33:48: warning: narrowing conversion of '(b.std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]
   33 |     vector <int> x={0,a.size()-1},y={0,b.size()-1};
      |                                        ~~~~~~~~^~
longesttrip.cpp:33:48: warning: narrowing conversion of '(b.std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]

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