/in/foo.cc: In function 'int main()':
/in/foo.cc:11:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   11 |                         if(i==1&&j==1||i==1&&j==n||i==n&&j==1||i==n&&j==n)cout<<"+";
      |                            ~~~~^~~~~~
/in/foo.cc:11:56: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   11 |                         if(i==1&&j==1||i==1&&j==n||i==n&&j==1||i==n&&j==n)cout<<"+";
      |                                                    ~~~~^~~~~~
/in/foo.cc:11:68: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   11 |                         if(i==1&&j==1||i==1&&j==n||i==n&&j==1||i==n&&j==n)cout<<"+";
      |                                                                ~~~~^~~~~~