Submission #672640

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
672640	2022-12-17 06:16:09	tbzard	Stations (IOI20_stations)	C++14	100 / 100	916 ms	756 KiB

stations

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
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30
#include <bits/stdc++.h>
using namespace std;
void dfs1(int u, int p, vector<int> &weight, vector<vector<int> > &g){
    weight[u] = 1;
    for(int i=0;i<g[u].size();i++){
        int v = g[u][i];
        if(v != p){
            dfs1(v, u, weight, g);
            weight[u] += weight[v];
        }
    }
}
void dfs2(int u, int p, int d, int l, int r, vector<int> &ans, vector<int> &weight, vector<vector<int> > &g){
    if(d%2 == 0){
        ans[u] = l;
        l++;
    }
    else{
        ans[u] = r;
        r--;
    }
    for(int i=0;i<g[u].size();i++){
        int v = g[u][i];
        if(v != p){
            dfs2(v, u, d+1, l, l+weight[v]-1, ans, weight, g);
            l += weight[v];
        }
    }
}
 
 
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Compilation message (stderr)

stations.cpp: In function 'void dfs1(int, int, std::vector<int>&, std::vector<std::vector<int> >&)':
stations.cpp:6:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |     for(int i=0;i<g[u].size();i++){
      |                 ~^~~~~~~~~~~~
stations.cpp: In function 'void dfs2(int, int, int, int, int, std::vector<int>&, std::vector<int>&, std::vector<std::vector<int> >&)':
stations.cpp:23:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for(int i=0;i<g[u].size();i++){
      |                 ~^~~~~~~~~~~~

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