Submission #959991

#	Time	Username	Problem	Language	Result	Execution time	Memory
959991		mannshah1211	Colors (BOI20_colors)	C++17	Compilation error	0 ms	0 KiB

Colors

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

int main() {
  int n;
  cin >> n;
  auto question = [&](int col) {
    cout << "? " << col << '\n';
    fflush(stdout);
    int x;
    cin >> x;
    fflush(stdout);
    return x;
  }
  auto output = [&](int col) {
    cout << "= " << col << '\n';
    fflush(stdout);
  };
  question(1);
  int lo = 0, hi = n - 1, ind = -1;
  while (lo <= hi) {
    int mid = (lo + hi) / 2;
    question(1);
    if (question(mid + 1)) {
      ind = mid;
      lo = mid + 1;
    } else {
      hi = mid - 1;
    }
  }
  if (ind == -1) {
    output(n);
  } else {
    output(ind);
  }
}

Compilation message (stderr)

Colors.cpp: In function 'int main()':
Colors.cpp:15:3: error: expected ',' or ';' before 'auto'
   15 |   auto output = [&](int col) {
      |   ^~~~
Colors.cpp:32:5: error: 'output' was not declared in this scope
   32 |     output(n);
      |     ^~~~~~
Colors.cpp:34:5: error: 'output' was not declared in this scope
   34 |     output(ind);
      |     ^~~~~~