Submission #467730

#	Time	Username	Problem	Language	Result	Execution time	Memory
467730		Nanogines	Colors (BOI20_colors)	C++14	Compilation error	0 ms	0 KiB

Colors

#include <bits/stdc++.h>
using namespace std;

#define int long long int
#define fastio ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
#define forn(i, a, b) for (int i=a; i<b; i++)
#define fore(i, a, b) for (int i=a; i<=b; i++)
typedef vector<int> vi;

void fast_io() {
  fastio;
// #ifndef ONLINE_JUDGE
//   freopen("input.txt", "r", stdin);
//   freopen("output.txt", "w", stdout);
// #endif
}


signed main()
{
  fast_io();
  int t;
  cin >> t;
  int n, q, m, l = 0, r; cin >> n;
  int c = 0;
  r = n;
  while (c == 0) {
    if (l == r) c = r;
    m = (l + r) / 2;
    cout << '?' << m << endl;
    cin >> q;
    if (q) r = mid;
    else l = mid + 1
    }
  cout << "= " << c << endl;
}

Compilation message (stderr)

Colors.cpp: In function 'int main()':
Colors.cpp:32:16: error: 'mid' was not declared in this scope
   32 |     if (q) r = mid;
      |                ^~~
Colors.cpp:33:14: error: 'mid' was not declared in this scope
   33 |     else l = mid + 1
      |              ^~~