Submission #591651

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
591651	2022-07-07 17:35:08	Iwanttobreakfree	Railway (BOI17_railway)	C++98	100 / 100	307 ms	39856 KiB

railway

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#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int cnt=0;
void dfs(int a,int par,vector<vector<int>>& g,vector<int>& t,vector<int>& li,vector<pair<int,int>>& pos,vector<vector<int>>& p,vector<int>& depth){
    p[a][0]=par;
    for(int i=1;i<19;i++)p[a][i]=p[p[a][i-1]][i-1];
    t[a]=li.size();
    pos[a].first=li.size();
    li.push_back(a);
    for(int x:g[a]){
        if(x==par)continue;
        depth[x]=depth[a]+1;
        dfs(x,a,g,t,li,pos,p,depth);
    }
    pos[a].second=li.size();
    li.push_back(a);
}
void r_upd(int n,int l,int r,vector<int>& t,vector<int>& la,int a,int b){
    //cout<<l<<' '<<r<<' '<<n<<'\n';
    if(b<a)return;
    if(a>r||b<l)return;
    if(a<=l&&r<=b){
        t[n]++;
        la[n]++;
    }else{
        int mid=(r+l)/2;
        if(la[n]){
            t[n<<1]+=la[n];
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

railway.cpp: In function 'int main()':
railway.cpp:121:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  121 |     for(int i=0;i<edge.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