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>
using namespace std;
void rot(int n, int &x, int &y, int rx, int ry) {
  if (ry == 0) {
    if (rx == 1) {
      x = n - 1 - x;
      y = n - 1 - y;
    }
    swap(x, y);
  }
}
void d2xy(int n, int d, int &x, int &y) {
  int rx, ry, s, t = d;
  x = y = 0;
  for (s = 1; s < n; s *= 2) {
    rx = 1 & (t / 2);
    ry = 1 & (t ^ rx);
    rot(s, x, y, rx, ry);
    x += s * rx;
    y += s * ry;
    t /= 4;
  }
}
int main() {
  int n, d;
  int x, y;
  scanf("%d%d", &n, &d);
  d2xy(1 << n, d, x, y);
  printf("%d %d\n", x, y);
  return 0;
}