foo.cc: In function ‘int main()’:
foo.cc:11:48: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   11 |                         if(i==j*10+x||i==x*10+j&&i==x*10+x!)
      |                                       ~~~~~~~~~^~~~~~~~~~~
foo.cc:11:59: error: expected ‘)’ before ‘!’ token
   11 |                         if(i==j*10+x||i==x*10+j&&i==x*10+x!)
      |                           ~                               ^
      |                                                           )