제출 #329728

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
329728	2020-11-22 08:47:33	chenwz	Stations (IOI20_stations)	C++14	100 / 100	1006 ms	1140 KiB

stations

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#include "stations.h"
#include <vector>
using namespace std;
typedef vector<int> IVec;
void rec(int u, int fa, bool pre_order, int &clock, const vector<IVec>& G, IVec& L) {
  if (pre_order) L[u] = clock++;
  for (int i : G[u])
    if (i != fa) rec(i, u, !pre_order, clock, G, L);
  if (!pre_order) L[u] = clock++;
}
IVec label(int n, int k, IVec u, IVec v) {
  IVec L(n);
  vector<IVec> G(n, IVec());
  for (int i = 0; i < u.size(); i++)
    G[u[i]].push_back(v[i]), G[v[i]].push_back(u[i]);
  int clock = 0;
  rec(0, -1, true, clock, G, L);
  return L;
}
int find_next_station(int s, int t, IVec c) {
  if (c[0] > s) {
    // Case 1: node s is in pre_order level.
    // All the neighbors are higher than s.
    if (t < s) {
      // The target is smaller than the source.
      // The target is definitely not in this subtree, go to parent.
 
 
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컴파일 시 표준 에러 (stderr) 메시지

stations.cpp: In function 'IVec label(int, int, IVec, IVec)':
stations.cpp:16:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |   for (int i = 0; i < u.size(); i++)
      |                   ~~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61