Submission #1114844

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1114844	2024-11-19 17:01:48	Newtonabc	Synchronization (JOI13_synchronization)	C++14	100 / 100	430 ms	25164 KiB

synchronization

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#include<bits/stdc++.h>
using namespace std;
const int N=1e5+10;
const int MIDX=1e5+5;
vector<int> adj[N];
pair<int,int> edge[N];
int dp[2][N],pa[18][N],in[N],out[N],cnt=1,fw[N];
bool op[N];
void upd(int idx,int val){while(idx<=MIDX){fw[idx]+=val; idx+=idx & -idx;}}
int read(int idx){int sum=0; while(idx>0){sum+=fw[idx]; idx-=idx & -idx;} return sum;}
void dfs(int u,int p){
    pa[0][u]=p;
    in[u]=cnt++;
    for(int i=0;i<adj[u].size();i++){
        int v=adj[u][i];
        if(v==p) continue;
        dfs(v,u);
    }
    out[u]=cnt;
}
int findr(int u){
    for(int i=17;i>=0;i--) if(read(in[pa[i][u]])==read(in[u])) u=pa[i][u];
    return u;
}
int main(){
    int n,m,q;
    cin>>n >>m >>q;
    for(int i=1;i<n;i++){
        int a,b;
        cin>>a >>b;
 
 
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Compilation message (stderr)

synchronization.cpp: In function 'void dfs(int, int)':
synchronization.cpp:14:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for(int i=0;i<adj[u].size();i++){
      |                 ~^~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 10 / 10
• Subtask 4: 20 / 20
• Subtask 5: 40 / 40