Submission #264861

#	Time	Username	Problem	Language	Result	Execution time	Memory
264861		Basilhijaz	Highway Tolls (IOI18_highway)	C++11	Compilation error	0 ms	0 KiB

highway

//#include "highway.h"
#include <bits/stdc++.h>

using namespace std;

void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
  int M = U.size();
  vector<int> w(M);
  for(int i = 0; i < M; i++){
    w[i] = 0;
  }
  vector<vector<pair<int, int> > > adj(N);
  for(int i = 0; i < M; i++){
    adj[U[i]].push_back({V[i], i});
    adj[V[i]].push_back({U[i], i});
  }
  long long curr = ask(w);
  int where = 0;
  bool ok = 1;
  while(ok){
    ok = 0;
    int lo = 0; int hi = adj[where].size() - 1;
    while(lo < hi){
        for(int j = lo; j < (lo + hi + 1)/2; j++){
            w[adj[where][j].second] = !w[adj[where][j].second];
        }
        long long last = ask(w);
        if(last != curr){
            curr = last;
            ok = 1;
            hi = (lo + hi + 1)/2 - 1;
        }
        else{
            lo = (lo + hi + 1)/2;
        }
    }
    if(ok)where = lo;
  }
  answer(0, where);
}

Compilation message (stderr)

highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:17:20: error: 'ask' was not declared in this scope
   17 |   long long curr = ask(w);
      |                    ^~~
highway.cpp:39:3: error: 'answer' was not declared in this scope
   39 |   answer(0, where);
      |   ^~~~~~