Submission #1235727

#	Time	Username	Problem	Language	Result	Execution time	Memory
1235727		Muhammad_Aneeq	Thousands Islands (IOI22_islands)	C++20	6.75 / 100	105 ms	12656 KiB

islands

#include "islands.h"

#include <variant>
#include <vector>
#include <map>
using namespace std;
variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) 
{
    if (N ==2) 
    {
    vector<int>ind[2]={};
    for (int i=0;i<M;i++)
      ind[U[i]].push_back(i);
        if (ind[0].size()>1&&ind[1].size())
        {
            vector<int>ans;
            ans.push_back(ind[0][0]);
            ans.push_back(ind[1][0]);
            ans.push_back(ind[0][1]);
            ans.push_back(ind[0][0]);
            ans.push_back(ind[1][0]);
            ans.push_back(ind[0][1]);
            return ans;
        }
        else
            return false;
    }
    map<pair<int,int>,int>ind;
    for (int i=0;i<M;i++)
        ind[{U[i],V[i]}]=i;
    vector<int>ans;
    ans.push_back({ind[{1,2}]});
    ans.push_back({ind[{2,1}]});
    ans.push_back({ind[{1,3}]});
    ans.push_back({ind[{3,1}]});
    ans.push_back({ind[{2,1}]});
    ans.push_back({ind[{1,2}]});
    ans.push_back({ind[{3,1}]});
    ans.push_back({ind[{1,3}]});
    return ans;
    // return false;
}

• Subtask 1: 5 / 5
• Subtask 2: 1.75 / 5
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 45