Submission #885253

#	Time	Username	Problem	Language	Result	Execution time	Memory
885253		epicci23	Stations (IOI20_stations)	C++17	0 / 100	3058 ms	2097152 KiB

stations

#include "stations.h"
#include "bits/stdc++.h"
using namespace std;
#define pb push_back
typedef long long ll;

vector<int> v[1005];
int ans[1005],ti=0;
int ttin[1005],ttout[1005];
void dfs(int c,int p,int d){
  ttin[c]=++ti;
  for(int x:v[c]){
    if(x==p) continue;
    dfs(x,c,d+1);
  }
  ttout[c]=ti;
}


vector<int> label(int n, int k,vector<int> u,vector<int> w) {
  vector<int> res(n);
  for(int i=0;i<n-1;i++){
    v[u[i]].pb(w[i]);
    v[w[i]].pb(u[i]);
  }
  dfs(0,0,0);
  
  for(int i=0;i<n;i++) res[i]=1001*ttout[i]+ttin[i];
  return res;
}

int find_next_station(int s, int t,vector<int> c) {
  int sin,sout,tin,tout;
  sin=s%1001;
  sout=(s-sin)/1001;
  tin=t%1001;
  tout=(t-tin)/1001;

  int ust=-1;

  for(int x:c){
    int xin,xout;
    xin=x%1001;
    xout=(x-xin)/1001;
    if(xin<=sin && sin<=xout){
        ust=x; 
    	continue;
    }
    if(xin<=tin && tin<=xout) return x;
  }
  return ust;
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:33:11: warning: variable 'sout' set but not used [-Wunused-but-set-variable]
   33 |   int sin,sout,tin,tout;
      |           ^~~~
stations.cpp:33:20: warning: variable 'tout' set but not used [-Wunused-but-set-variable]
   33 |   int sin,sout,tin,tout;
      |                    ^~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61