Submission #124793

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
124793	2019-07-04 02:05:25	model_code	Cat in a tree (BOI17_catinatree)	C++17	100 / 100	97 ms	19960 KiB

catinatree

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#include<cstdio>
#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int N,D;
vector<vector<int> > T;
vector<int> opt, optdist, sacrdist;
void DFS(int pos) {
  // Base case: pos is a leaf
  if(T[pos].size() == 0) {
    opt[pos] = 1;
    optdist[pos] = 0;
    sacrdist[pos] = D;
    return;
  }
  
  int v = T[pos][0];
  DFS(v);
  if(optdist[v] + 1 >= D) {
    opt[pos] = opt[v] + 1;
    optdist[pos] = 0;
    sacrdist[pos] = optdist[v] + 1;
  } else {
    opt[pos] = opt[v];
    optdist[pos] = optdist[v] + 1;
    sacrdist[pos] = sacrdist[v] + 1;
 
 
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Compilation message (stderr)

catinatree.cpp: In function 'void DFS(int)':
catinatree.cpp:33:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 1; i < T[pos].size(); ++i) {
                 ~~^~~~~~~~~~~~~~~
catinatree.cpp:49:7: warning: unused variable 'dss' [-Wunused-variable]
   int dss = sacrdist[pos] + sacrdist[v] + 1;
       ^~~
catinatree.cpp: In function 'int main()':
catinatree.cpp:69:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &N, &D);
  ~~~~~^~~~~~~~~~~~~~~~
catinatree.cpp:76:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a);
   ~~~~~^~~~~~~~~~

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