/in/foo.cc: In function 'int main()':
/in/foo.cc:11:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  else if(b==1&&y==19||b==19&&y==1) cout<<min(a+x+16,56-a-x),exit(0);
          ~~~~^~~~~~~
/in/foo.cc:12:14: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  else if(a==1&&x==19||a==19&&x==1) cout<<min(b+y+16,56-b-y),exit(0);
          ~~~~^~~~~~~