Submission #1258408

#	Time	Username	Problem	Language	Result	Execution time	Memory
1258408		tritranminh2808	Cat in a tree (BOI17_catinatree)	C++20	0 / 100	3 ms	4928 KiB

catinatree

#include <bits/stdc++.h>
using namespace std;
vector <int> adj[200005];
int sz[2000005];
bool vst[200005];
// int depg[200005];
int d;
int cnt=1;
int f[200005];// khoang cach den thang gan nhat trong nhanh u ma chon duoc
int dis=0;
void dfs(int u, int v){
    // cout << u << dis << " ";
    if(dis==d) {
        cnt++;
        dis=0;
    }
    for(auto i:adj[u]){
        if(i==v) continue;
        
        dis++;
        dfs(i,u);
        
    }
    // dis--;
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n; cin >> n >> d;
    for(int i=1;i<n;i++){
        int u; cin>> u;
        adj[u].push_back(i);
        adj[i].push_back(u);
    }
    dfs(0,-1);
    cout << cnt;
    return 0;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 40
• Subtask 3: 0 / 49