foo.c: In function 'FindSecondMax':
foo.c:31:35: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   31 |                 else if(a[i]==max1&&max1!=max2||a[i]>max2)
      |                         ~~~~~~~~~~^~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务