Submission #885254

#	Time	Username	Problem	Language	Result	Execution time	Memory
885254		epicci23	Stations (IOI20_stations)	C++17	Compilation error	0 ms	0 KiB

stations

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

vector<int> v[1005];
ll ti=0;
ll ttin[1005],ttout[1005];

void dfs(int c,int p){
  ttin[c]=++ti;
  for(int x:v[c]){
    if(x==p) continue;
    dfs(x,c);
  }
  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);
  
  for(int i=0;i<n;i++) res[i]=1001*ttout[i]+ttin[i];
  return res;
}

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

  ll ust=-1;

  for(int x:c){
    ll xin,xout;
    xin=x%1001;
    xout=(x-xin)/1001;
    if(xin<=sin && sin<=xout){
        ust=x; 
    	continue;
    }
    if(xin<=tin && tin<=xout) return x;
  }
  assert(ust!=-1);
  return ust;
}

Compilation message (stderr)

stations.cpp: In function 'll find_next_station(ll, ll, std::vector<long long int>)':
stations.cpp:34:10: warning: variable 'sout' set but not used [-Wunused-but-set-variable]
   34 |   ll sin,sout,tin,tout;
      |          ^~~~
stations.cpp:34:19: warning: variable 'tout' set but not used [-Wunused-but-set-variable]
   34 |   ll sin,sout,tin,tout;
      |                   ^~~~
/usr/bin/ld: /tmp/ccqYnbFj.o: in function `main':
stub.cpp:(.text.startup+0x4cc): undefined reference to `find_next_station(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status