Submission #321512

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
321512	2020-11-12 15:35:43	NachoLibre	Stations (IOI20_stations)	C++14	100 / 100	1124 ms	1280 KiB

stations

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#include <bits/stdc++.h>
using namespace std;
const int N = 1003;
vector<int> v[N], dr;
int tn;
void sgd(int dg, int op, int dt) {
  if(dt & 1 ^ 1) dr[dg] = tn, ++tn;
  for(int i = 0; i < v[dg].size(); ++i) {
    if(v[dg][i] != op) {
      sgd(v[dg][i], dg, dt + 1);
    }
  }
  if(dt & 1) dr[dg] = tn, ++tn;
}
vector<int> label(int n, int k, vector<int> x, vector<int> y) {
  for(int i = 0; i < n; ++i) v[i].clear();
  for(int i = 0; i < n - 1; ++i) {
    v[x[i]].push_back(y[i]);
    v[y[i]].push_back(x[i]);
  }
  dr.clear();
  for(int i = 0; i < n; ++i) dr.push_back(0);
  tn = 0;
  sgd(0, -1, 0);
  return dr;
}
 
 
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Compilation message (stderr)

stations.cpp: In function 'void sgd(int, int, int)':
stations.cpp:9:8: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
    9 |  if(dt & 1 ^ 1) dr[dg] = tn, ++tn;
      |     ~~~^~~
stations.cpp:10:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |  for(int i = 0; i < v[dg].size(); ++i) {
      |                 ~~^~~~~~~~~~~~~~

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