Submission #426569

#	Time	Username	Problem	Language	Result	Execution time	Memory
426569		radaiosm7	Finding Routers (IOI20_routers)	C++17	Compilation error	0 ms	0 KiB

routers

#include <bits/stdc++.h>
using namespace std;
int i, lo, hi, mid;

vector<int> find_routers(int l, int n, int q) {
  vector<int> ans(n);
  ans[0] = 0;

  for (i=1; i < n; ++i) {
    lo = ans[i-1]+2;
    hi = l;

    while (lo < hi) {
      mid = (lo+hi)/2;

      if (use_detector(mid) == i) {
        hi = mid;
      }

      else {
        lo = mid+1;
      }
    }

    ans[i] = 2*(mid-1)-ans[i-1];
  }

  return ans;
}

Compilation message (stderr)

routers.cpp: In function 'std::vector<int> find_routers(int, int, int)':
routers.cpp:16:11: error: 'use_detector' was not declared in this scope
   16 |       if (use_detector(mid) == i) {
      |           ^~~~~~~~~~~~