제출 #1256847

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1256847		rhm_gan	Split the Attractions (IOI19_split)	C++20	18 / 100	47 ms	11724 KiB

split

#include "split.h"
#include <bits/stdc++.h>
using namespace std;

const int N = 1e5 + 1;

vector<int> g[N];
vector<int> res;
bool vis[N];

pair<int, int> A, B, C;
vector<int> path;

void dfs(int u, int c) {
    int mx = N;
    if (c == A.second) mx = A.first;
    if (c == B.second) mx = B.first;
    if (c == C.second) mx = C.first;
    if (path.size() == mx) {
        return;
    }
    vis[u] = true;
    path.push_back(u);
    for (auto v : g[u]) {
        if (!vis[v]) {
            dfs(v, c);
        }
    }
}

vector<int> find_split(int n, int a, int b, int c, vector<int> p, vector<int> q) {
    res.resize(n);
    A = {a, 1};
    B = {b, 2};
    C = {c, 3};
    if (A > B) swap(A, B);
    if (A > C) swap(A, C);
    if (B > C) swap(B, C);
    for (int i = 0; i < p.size(); i++) {
        g[p[i]].push_back(q[i]);
        g[q[i]].push_back(p[i]);
    }
    int x = 0;
    for (int i = 0; i < n; i++) {
        if (g[i].size() == 1) {
            x = i;
            break;
        }
    }
    dfs(x, A.second);
    vector<int> v = path;
    for (int i = 0; i < n; i++) {
        if (!vis[i]) {
            path.clear();
            dfs(i, B.second);
            if (path.size() == B.first) {
                for (auto u : path) {
                    res[u] = B.second;
                }
                for (auto u : v) {
                    res[u] = A.second;
                }
                for (int i = 0; i < n; i++) {
                    if (res[i] == 0) {
                        res[i] = C.second;
                    }
                }
                return res;
            }
        }
    }
    return res;
}

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36