Submission #1077411

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077411		Faisal_Saqib	Thousands Islands (IOI22_islands)	C++17	10 / 100	100 ms	21540 KiB

islands

#include <bits/stdc++.h>
#include <variant>
#include <vector>
using namespace std;

std::variant<bool, std::vector<int>> find_journey(int N, int M, std::vector<int> v1, std::vector<int> v2)
{
    int n=N,m=M;
    map<pair<int,int>,vector<int>> cnt;
    for(int j=0;j<m;j++)
        cnt[{v1[j],v2[j]}].push_back(j);
    if(n>2)
    {
        int edge01=cnt[{0,1}][0];
        int edge10=cnt[{1,0}][0];
        int edge02=cnt[{0,2}][0];
        int edge20=cnt[{2,0}][0];
        int edge12=cnt[{1,2}][0];
        int edge21=cnt[{2,1}][0];
        return vector<int>({edge01,edge12,edge20,edge02,edge21,edge10,edge20,edge12,edge01,edge10,edge21,edge02});
    }
    else if(cnt[{0,1}].size()>=2 and cnt[{1,0}].size()>=1)
    {
        int f=cnt[{0,1}][0];
        int s=cnt[{0,1}][1];
        int th=cnt[{1,0}][0];
        return vector<int>({f,th,s,f,th,s});
    }
    else
    {
        return false;
    }
}

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