7 7 7
1
2
3
4
5
6
7
 4 2 8
1
3
4
2
3
4
1
2
 9 4 9
1
2
3
4
5
6
7
8
9
 7 5 7
1
2
3
4
5
6
7
 15 10 15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
 4 0 4
1
2
3
4
 12 2 12
1
2
3
4
5
6
7
8
9
10
11
12
 10 2 10
1
2
3
4
5
6
7
8
9
10
 7 4 7
1
2
3
4
5
6
7
 7 3 7
1
2
3
4
5
6
7

XXXXXXX
 ..XX.X.X
 ...X.X.XX
 .X.XXXX
 .X.X.X.X.XXXXXX
 ....
 .........X.X
 .......X.X
 .X.X.XX
 ...X.XX

#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n, x, t, f = 0;
  cin >> n >> x >> t;
  if (x <= n / 2 + (n % 2 != 0)) f = 1;
  while (t--) {
    long long pos;
    cin >> pos;
    if (f) {
      if (n & 1) {
        if (pos > n - x * 2 + 1) {
          if (pos == n && x >= 1)
            cout << "X";
          else if (pos & 1)
            cout << ".";
          else
            cout << "X";
        } else
          cout << ".";
      } else {
        if (pos > n - x * 2) {
          if (pos & 1)
            cout << ".";
          else
            cout << "X";
        } else
          cout << ".";
      }
    } else {
      long long now = x - n / 2;
      if (pos <= n - now * 2) {
        if (pos & 1)
          cout << ".";
        else
          cout << "X";
      } else
        cout << "X";
    }
  }
}
