Submission #1061390

#	Time	Username	Problem	Language	Result	Execution time	Memory
1061390		dozer	Beech Tree (IOI23_beechtree)	C++17	9 / 100	2013 ms	28992 KiB

beechtree

#include "beechtree.h"
#include <bits/stdc++.h>
using namespace std;
#define sp " "
#define endl "\n"
#define fileio() freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#define fastio() cin.tie(0), ios_base::sync_with_stdio(0)
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define LL node * 2
#define RR node * 2 + 1
#define ll long long
#define MAXN 300005

vector<pii> adj[MAXN];
int sz[MAXN];

void dfs(int node){
    sz[node] = 1;
    for (auto i :adj[node]){
        dfs(i.st);
        sz[node] += sz[i.st];
    }
}

vector<int> beechtree(int N, int M, std::vector<int> P, std::vector<int> C)
{
    for (int i = 0; i < N; i++) adj[i].clear();   
    for (int i = 1; i < N; i++){
        adj[P[i]].pb({i, C[i]});
    }

    dfs(0);
    for (int i = 0; i < N; i++){
        sort(adj[i].begin(), adj[i].end(), [&](pii a, pii b){
            return sz[a.st] > sz[b.st];
        });
    }
    int n = N;
    vector<int> ans(N, 1);
    for (int i = n - 1; i >= 0; i--){
        vector<int> curr, cnt(M + 2, 0);
        queue<int> q;
        q.push(i);
        curr.pb(i);
        while(!q.empty()){
            int top = q.front();
            q.pop();
            for (auto j : adj[top]){
                if (curr[cnt[C[j.st]]] != P[j.st]) ans[i] = 0;
                curr.pb(j.st);
                cnt[C[j.st]]++;
                q.push(j.st);
            }
        }
    }

    return ans;
}
/*
int main()
{
    fileio();
    int N, M;
    assert(2 == scanf("%d %d", &N, &M));
    std::vector<int> P(N);
    for (int i = 0; i < N; ++i)
        assert(1 == scanf("%d", &P[i]));
    std::vector<int> C(N);
    for (int i = 0; i < N; ++i)
        assert(1 == scanf("%d", &C[i]));

    fclose(stdin);

    std::vector<int> res = beechtree(N, M, P, C);

    int n = res.size();
    for (int i = 0; i < n; ++i)
    {
        if (i > 0)
            printf(" ");
        printf("%d", res[i]);
    }
    printf("\n");
    fclose(stdout);

    return 0;
}*/

• Subtask 0: 0 / 0
• Subtask 1: 0 / 9
• Subtask 2: 0 / 5
• Subtask 3: 9 / 9
• Subtask 4: 0 / 8
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 12
• Subtask 8: 0 / 17
• Subtask 9: 0 / 12