Submission #134953

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
134953	2019-07-23 13:19:05	songc	Cat in a tree (BOI17_catinatree)	C++14	100 / 100	208 ms	16484 KiB

catinatree

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#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
int N, K, ans;
int D[202020], dep[202020];
vector<int> adj[202020];
vector<pii> V;
void dfs(int u, int p, int d){
  if (D[u] >= d) return;
  D[u] = d;
  for (int v : adj[u]) if (v != p) dfs(v, u, d-1);
}
int main(){
  scanf("%d %d", &N, &K);
  for (int i=2; i<=N; i++){
    int x;
    scanf("%d", &x);
    adj[x+1].push_back(i);
    adj[i].push_back(x+1);
    dep[i] = dep[x+1] + 1;
  }
  for (int i=1; i<=N; i++) V.push_back(pii(-dep[i], i));
  sort(V.begin(), V.end());
  for (int i=0; i<N; i++){
    int u = V[i].second;
    if (D[u]) continue;
 
 
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Compilation message (stderr)

catinatree.cpp: In function 'int main()':
catinatree.cpp:18:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &N, &K);
  ~~~~~^~~~~~~~~~~~~~~~~
catinatree.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x);
   ~~~~~^~~~~~~~~~

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