Submission #566215

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
566215	2022-05-22 06:44:14	shahriarkhan	One-Way Streets (CEOI17_oneway)	C++14	0 / 100	3 ms	2900 KiB

oneway

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#include<bits/stdc++.h>
using namespace std ;
//1 = L
//2 = B
//3 = R
const int MX = 1e5 + 5 , LG = 25 ;
int bridge[MX] , up[MX][LG] , vis[MX] , ans[MX] , low[MX] , tin[MX] , tout[MX] , timer = 0 , sub[MX][2] ;
vector<pair<int,int> > adj[MX] , edges ;
void dfs(int s , int p)
{
    if(vis[s]) return ;
    up[s][0] = p , vis[s] = 1 , tin[s] = ++timer , low[s] = tin[s] ;
    for(int i = 1 ; i < LG ; ++i)
    {
        up[s][i] = up[up[s][i-1]][i-1] ;
    }
    for(pair<int,int> t : adj[s])
    {
        if(t.first==p) continue ;
        if(vis[t.first]) low[s] = min(low[s],tin[t.first]) ;
        else
        {
            dfs(t.first,s) ;
            low[s] = min(low[s],low[t.first]) ;
            if(low[t.first]>tin[s]) bridge[t.second] = 1 ;
 
 
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Compilation message (stderr)

oneway.cpp: In function 'int main()':
oneway.cpp:89:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |     scanf("%d%d",&n,&m) ;
      |     ~~~~~^~~~~~~~~~~~~~
oneway.cpp:94:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   94 |         scanf("%d%d",&a,&b) ;
      |         ~~~~~^~~~~~~~~~~~~~
oneway.cpp:104:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  104 |     scanf("%d",&q) ;
      |     ~~~~~^~~~~~~~~
oneway.cpp:108:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  108 |         scanf("%d%d",&u,&v) ;
      |         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40