/in/foo.cc: In function 'int main()':
/in/foo.cc:16:30: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   16 |                 if(a>=11&&a>b&&a-b>=2||b>=11&&b>a&&b-a>=2)
      |                    ~~~~~~~~~~^~~~~~~~
/in/foo.cc:29:30: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   29 |                 if(a==21&&a>b&&a-b>=2||b==21&&b>a&&b-a>2) {//即使先到了21分，也要胜出对方2分
      |                    ~~~~~~~~~~^~~~~~~~
/in/foo.cc:33:37: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   33 |                 } else if(a>=21&&a>b&&a-b>=2||b>=21&&b>a&&b-a>=2) {
      |                           ~~~~~~~~~~^~~~~~~~