Submission #633220

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
633220	2022-08-21 23:51:14	tutis	Thousands Islands (IOI22_islands)	C++17	100 / 100	225 ms	44604 KiB

islands

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#include "islands.h"
#include <variant>
#include <vector>
#include <bits/stdc++.h>
using namespace std;
variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) {
    int s = 0;
    vector<bool> e(N, true);
    vector<int>ans0;
    {
        vector<int> C(N, 0);
        vector<int>b[N];
        vector<int>ff[N];
        for (int i = 0; i < M; i++)
        {
            C[U[i]]++;
            b[V[i]].push_back(U[i]);
            ff[U[i]].push_back(i);
        }
        stack<int>Q;
        for (int i = 0; i < N; i++)
            if (C[i] == 0)
                Q.push(i);
        while (e[s])
        {
            if (C[s] == 1)
            {
                int s_ = -1;
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 21 / 21
• Subtask 4: 24 / 24
• Subtask 5: 45 / 45