Submission #340082

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
340082	2020-12-26 20:39:51	wildturtle	One-Way Streets (CEOI17_oneway)	C++17	100 / 100	487 ms	43376 KiB

oneway

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#include<bits/stdc++.h>
using namespace std;
long long a,b,c,d,i,e,f,g,n,m,k,l,t,q;
long long disc[500005],low[500005],A[500005],B[500005],C[500005],D[500005],E[500005];
long long P[22][500005],br[500005],ans[500005],in[500005],out[500005];
vector < pair <long long , long long > > v[500005];
void dfs(long long x,long long y) {
    t++;
    disc[x]=t; low[x]=t;
    for(long long i=0;i<v[x].size();i++) {
        if(v[x][i].first==x) continue;
        if(disc[v[x][i].first]==0) {
            P[0][v[x][i].first]=x; D[v[x][i].first]=D[x]+1; E[v[x][i].first]=v[x][i].second;
            dfs(v[x][i].first,x);
            low[x]=min(low[x],low[v[x][i].first]);
            if(low[v[x][i].first]>disc[x]) br[v[x][i].first]=1;
        }
        else {
            if(P[0][v[x][i].first]==x) br[v[x][i].first]=0;
            if(v[x][i].first!=P[0][x]) low[x]=min(low[x],disc[v[x][i].first]);
        }
    }
}
int LCA(int u, int v) {
    if(D[u]<D[v]) swap(u, v);
    for(int k = 18 - 1; ~k; k--)
        if (D[P[k][u]]>=D[v]) u=P[k][u];
    if(u==v) return u;
    for (int k=18-1; ~k; k--)
        if(P[k][u]!=P[k][v]) { u=P[k][u]; v=P[k][v]; }
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

oneway.cpp: In function 'void dfs(long long int, long long int)':
oneway.cpp:10:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(long long i=0;i<v[x].size();i++) {
      |                       ~^~~~~~~~~~~~

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