Submission #666875

#	Time	Username	Problem	Language	Result	Execution time	Memory
666875		Hacv16	Ball Machine (BOI13_ballmachine)	C++17	0 / 100	1 ms	596 KiB

ballmachine

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

typedef long long ll;

const int MAX = 450;
const int INF = 0x3f3f3f3f;

int n, q, filled[MAX], add, root, ans;
vector<int> adj[MAX];

void dfs(int u, int p){
    for(auto v : adj[u]){
        if(v == p) continue;
        if(!filled[v]) dfs(v, u);
    }

    if(add && !filled[u]) filled[u] = true, ans = u, add--;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n >> q;

    for(int i = 1; i <= n; i++){
        int x; cin >> x;

        if(x != 0){
            adj[x].push_back(i);
            adj[i].push_back(x);

        }else{
            root = i;
        }
    }

    for(int i = 1; i <= n; i++)
        sort(adj[i].begin(), adj[i].end());

    while(q--){
        int op, k; cin >> op >> k;

        if(op == 1){
            add = k;
            ans = root;
            dfs(root, -1);

            cout << ans << '\n';

        }else{
            cout << rand() << '\n';
        }
    }

    return 0;
}

• Subtask 1: 0 / 25
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40
• Subtask 4: 0 / 5