foo.cc: In function 'int isSuperPrime(int)':
foo.cc:24:6: warning: unused variable 'i' [-Wunused-variable]
   24 |  int i;
      |      ^
foo.cc: In function 'int main()':
foo.cc:37:14: warning: unused variable 'cnt' [-Wunused-variable]
   37 |  int a,b,sum,cnt=0;
      |              ^~~
foo.cc:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |  scanf("%d%d",&a,&b);
      |  ~~~~~^~~~~~~~~~~~~~
foo.cc:44:7: warning: 'sum' may be used uninitialized in this function [-Wmaybe-uninitialized]
   44 |    sum++;
      |    ~~~^~

[Hydro](https://hydro.ac)提供评测服务