Submission #1006778

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006778		amin	Longest Trip (IOI23_longesttrip)	C++17	30 / 100	867 ms	848 KiB

longesttrip

#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> mer(vector<int>a,vector<int>b)
{
    vector<int>ans;
    reverse(b.begin(),b.end());
ans=a;
for(int i=0;i<b.size();i++)
{
    ans.push_back(b[i]);
}
return ans;
}
vector<int> longest_trip(int n, int d)
{
    int c[n][n];

    for(int i=0;i<n;i++)
    {
        c[i][i]=0;
        for(int y=0;y<i;y++)
        {
            if(are_connected({i},{y}))
                {
                    c[i][y]=1;
                    c[y][i]=1;

                }else
                {
                c[i][y]=0;
                c[y][i]=0;
                }

        }
    }
    vector<int>v1;
    vector<int>v2;
    v1.push_back(0);
    v2.push_back(1);
    for(int i=2;i<=n;i++)
    {
        int x=v1[v1.size()-1];
        int y=v2[v2.size()-1];
        if(c[x][y]==1)
        {
          //  cout<<1<<' '<<i<<endl;
            v1=mer(v1,v2);
            v2.clear();
            if(i!=n)
            v2.push_back(i);
            continue;
        }
        if(i==n)
            break;
        if(c[x][i]==1)
        {
            //cout<<2<<' '<<i<<endl;
            v1.push_back(i);
            continue;
        }
        if(c[y][i]==1)
        {
            //cout<<3<<' '<<i<<endl;
            v2.push_back(i);
            continue;
        }
    }

    if(v2.size()>v1.size())
        swap(v1,v2);
    return v1;
}

Compilation message (stderr)

longesttrip.cpp: In function 'std::vector<int> mer(std::vector<int>, std::vector<int>)':
longesttrip.cpp:9:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 | for(int i=0;i<b.size();i++)
      |             ~^~~~~~~~~

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