foo.cc:27:2: warning: "/*" within comment [-Wcomment]
   27 |  /*int sum,a,b,c;
      |   
foo.cc:36:2: warning: "/*" within comment [-Wcomment]
   36 |  /*int a, b, c, s;
      |   

[Hydro](https://hydro.ac)提供评测服务