Submission #1057597

#	Time	Username	Problem	Language	Result	Execution time	Memory
1057597		vjudge1	Thousands Islands (IOI22_islands)	C++17	10 / 100	16 ms	4448 KiB

islands

#include "islands.h"

#include <variant>
#include <vector>
using namespace std;
variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) {
    if(N==2) {
        vector<int>atob,btoa;
        for(int i=0;i<M;i++)
            (U[i]?btoa:atob).push_back(i);
        if(atob.size()<2||btoa.empty())
            return false;
        vector<int>v;
        v.push_back(atob[0]);
        v.push_back(btoa[0]);
        v.push_back(atob[1]);
        v.push_back(atob[0]);
        v.push_back(btoa[0]);
        v.push_back(atob[1]);
        return v;
    } else {
        int go[3][3]{};
        for(int i=0;i<M;i++)
            if(U[i]<3&&V[i]<3)
                go[U[i]][V[i]]=i;
        vector<int>v;
        v.push_back(go[0][1]);
        v.push_back(go[1][0]);
        v.push_back(go[0][2]);
        v.push_back(go[2][0]);
        v.push_back(go[1][0]);
        v.push_back(go[0][1]);
        v.push_back(go[2][0]);
        v.push_back(go[0][2]);
        return v;
    }
}

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