Submission #736513

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
736513	2023-05-05 20:30:51	puppy	Thousands Islands (IOI22_islands)	C++17	100 / 100	286 ms	35780 KiB

islands

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#include "islands.h"
#include <variant>
#include <vector>
#include <utility>
#include <functional>
#include <algorithm>
#include <iostream>
#include <set>
#include <queue>
using namespace std;
set<int> out[100005];
set<int> in[100005];
bool removed[100005];
bool visited[100005];
bool cycle[100005];
std::variant<bool, std::vector<int>> find_journey(
    int N, int M, std::vector<int> U, std::vector<int> V) {
        for (int i = 0; i < M; i++) {
            out[U[i]].insert(i);
            in[V[i]].insert(i);
        }
        queue<int> q;
        for (int i = 0; i < N; i++) {
            if (out[i].empty()) {
                removed[i] = true;
                q.push(i);
            }
        }
        while (!q.empty()) {
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 21 / 21
• Subtask 4: 24 / 24
• Subtask 5: 45 / 45