foo.cc: In function ‘void mon(int, int, int, int, int&, int&, int&)’:
foo.cc:53:37: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
   53 |                 if(w[a][b] >> 2 & 1 == 0 && g[a][b + 1]) bb++;
      |                                   ~~^~~~
foo.cc:59:48: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
   59 |                                 if(w[a][b] & 1 == 0 && g[a - 1][b]) aa--;
      |                                              ~~^~~~
foo.cc:64:53: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
   64 |                                 if(w[a][b] >> 3 & 1 == 0 && g[a + 1][b]) aa++;
      |                                                   ~~^~~~
foo.cc:71:37: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
   71 |                 if(w[a][b] >> 1 & 1 == 0 && g[a][b - 1]) bb--;
      |                                   ~~^~~~
foo.cc:77:48: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
   77 |                                 if(w[a][b] & 1 == 0 && g[a - 1][b]) aa--;
      |                                              ~~^~~~
foo.cc:82:53: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
   82 |                                 if(w[a][b] >> 3 & 1 == 0 && g[a + 1][b]) aa++;
      |                                                   ~~^~~~
foo.cc:92:40: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
   92 |                         if(w[a][b] & 1 == 0 && g[a - 1][b]) aa--;
      |                                      ~~^~~~
foo.cc:97:45: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
   97 |                         if(w[a][b] >> 3 & 1 == 0 && g[a + 1][b]) aa++;
      |                                           ~~^~~~
foo.cc: In function ‘int main()’:
foo.cc:182:28: warning: ‘tt’ may be used uninitialized [-Wmaybe-uninitialized]
  182 |                         add(xx, yy, aa, bb, tt, idx, i);
      |                         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:178:45: note: ‘tt’ was declared here
  178 |                         int aa = a, bb = b, tt;
      |                                             ^~
foo.cc:151:44: warning: ‘x’ may be used uninitialized [-Wmaybe-uninitialized]
  151 |         Node st = {x, y, a, b, 0, -1, 0, -1};
      |                                            ^
foo.cc:127:13: note: ‘x’ was declared here
  127 |         int x, y, a, b;
      |             ^
foo.cc:151:44: warning: ‘y’ may be used uninitialized [-Wmaybe-uninitialized]
  151 |         Node st = {x, y, a, b, 0, -1, 0, -1};
      |                                            ^
foo.cc:127:16: note: ‘y’ was declared here
  127 |         int x, y, a, b;
      |                ^
foo.cc:151:44: warning: ‘a’ may be used uninitialized [-Wmaybe-uninitialized]
  151 |         Node st = {x, y, a, b, 0, -1, 0, -1};
      |                                            ^
foo.cc:127:19: note: ‘a’ was declared here
  127 |         int x, y, a, b;
      |                   ^
foo.cc:151:44: warning: ‘b’ may be used uninitialized [-Wmaybe-uninitialized]
  151 |         Node st = {x, y, a, b, 0, -1, 0, -1};
      |                                            ^
foo.cc:127:22: note: ‘b’ was declared here
  127 |         int x, y, a, b;
      |                      ^

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