Problem: <image>

Input

The input contains two integers a1, a2 (0 ≤ ai ≤ 32), separated by a single space.

Output

Output a single integer.

Examples

Input

1 1


Output

0


Input

3 7


Output

0


Input

13 10


Output

1

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
int main() {
  int n, d, x = 0, y = 0, v = 0, r = 0;
  scanf("%d%d", &n, &d);
  for (int i = 2 * n - 2; i >= 0; i -= 2) {
    r = 4 * v | (d >> i) & 3;
    x = (x << 1) | (0x936c >> r) & 1;
    y = (y << 1) | (0x39c6 >> r) & 1;
    v = (0x3e6b94c1 >> 2 * r) & 3;
  }
  printf("%d %d", x, y);
}