Submission #557184

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
557184	2022-05-04 20:36:26	MilosMilutinovic	Inside information (BOI21_servers)	C++14	50 / 100	248 ms	30428 KiB

servers

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#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
#define pii pair<int,int>
const int N=120050;
const int M=2*N;
const int L=20;
int n,q,op[M],x[M],y[M],par[N][L],dep[N],w[N],up[N],dw[N];
vector<pii> E[N];
void DFS1(int u,int p){
  if(w[u]>w[p])dw[u]=dw[p],up[u]=p;
  else up[u]=up[p],dw[u]=p;
  dep[u]=dep[p]+1;
  par[u][0]=p;
  for(int i=1;i<L;i++)par[u][i]=par[par[u][i-1]][i-1];
  for(auto e:E[u])if(e.first!=p){
    w[e.first]=e.second;
    DFS1(e.first,u);
  }
}
int LCA(int u,int v){
  if(dep[u]<dep[v])swap(u,v);
  for(int i=L-1;~i;i--)if(dep[par[u][i]]>=dep[v])u=par[u][i];
  for(int i=L-1;~i;i--)if(par[u][i]!=par[v][i])u=par[u][i],v=par[v][i];
  return u==v?u:par[u][0];
}
int Lift(int u,int k){for(int i=L-1;i>=0;i--)if(k>>i&1)u=par[u][i];return u;}
bool conn(int u,int v,int t){
  bool ok=true;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

servers.cpp: In function 'int main()':
servers.cpp:44:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |  scanf("%i%i",&n,&q);
      |  ~~~~~^~~~~~~~~~~~~~
servers.cpp:48:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |   scanf("\n%c %i",&ch,&x[i]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~
servers.cpp:50:20: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   50 |   if(op[i]!=3)scanf("%i",&y[i]);
      |               ~~~~~^~~~~~~~~~~~

• Subtask 1: 2.5 / 2.5
• Subtask 2: 0 / 2.5
• Subtask 3: 2.5 / 2.5
• Subtask 4: 0 / 2.5
• Subtask 5: 5 / 5
• Subtask 6: 0 / 5
• Subtask 7: 10 / 10
• Subtask 8: 0 / 10
• Subtask 9: 12.5 / 12.5
• Subtask 10: 0 / 12.5
• Subtask 11: 17.5 / 17.5
• Subtask 12: 0 / 17.5