/in/foo.cc: In function 'int main()':
/in/foo.cc:13:22: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   13 |         if(a==11&&a>b&&a-b>=2||b==11&&b>a&&b-a>=2){
      |            ~~~~~~~~~~^~~~~~~~
/in/foo.cc:18:27: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   18 |         else if(a>=11&&a>b&&a-b>=2||b>=11&&b>a&&b-a>=2){
      |                 ~~~~~~~~~~^~~~~~~~
/in/foo.cc:30:22: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   30 |         if(a==21&&a>b&&a-b>=2||b==21&&b>a&&b-a>2){
      |            ~~~~~~~~~~^~~~~~~~
/in/foo.cc:35:27: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   35 |         else if(a>=21&&a>b&&a-b>=2||b>=21&&b>a&&b-a>=2){
      |                 ~~~~~~~~~~^~~~~~~~
/in/foo.cc: At global scope:
/in/foo.cc:44:1: error: '\U00007136\U0000540e\U00005c31\U00006109\U00005feb\U00005730AC\U00005566\U0000ff01' does not name a type
   44 | 然后就愉快地AC啦！
      | ^~~~~~~~~~~~~~~~~~