Submission #239538

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
239538	2020-06-16 08:31:17	dsjong	Railway (BOI17_railway)	C++14	100 / 100	241 ms	37620 KiB

railway

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#include <bits/stdc++.h>
using namespace std;
vector<int>adj[200005];
int ind[200005], tim[200005];
int dep[200005];
int a[200005];  //actual rmq array (corresponding depths of tour vector)
vector<int>tour;
int timer=0;
void dfs(int i,int p){
    tim[i]=timer++;
    if(!dep[i]) dep[i]=dep[p]+1;
    ind[i]=tour.size();
    tour.push_back(i);
    for(int j:adj[i]){
        if(j!=p){
            dfs(j,i);
            tour.push_back(i);
        }
    }
}
int st[200005][20];
void build(int n){
    for(int i=0;i<n;i++){
        st[i][0]=i;
    }
    for(int j=1;(1<<j)<=n;j++){
        for(int i=0;i+(1<<j)<=n;i++){
            if(a[st[i][j-1]]>a[st[i+(1<<(j-1))][j-1]]){
                st[i][j]=st[i+(1<<(j-1))][j-1];
            }
 
 
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Compilation message (stderr)

railway.cpp: In function 'int main()':
railway.cpp:71:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<tour.size();i++){
                 ~^~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 15 / 15
• Subtask 3: 7 / 7
• Subtask 4: 29 / 29
• Subtask 5: 16 / 16
• Subtask 6: 25 / 25