foo.cc: In function 'int main()':
foo.cc:5:21: warning: unused variable 'max' [-Wunused-variable]
    5 |         int s,n,m,r,max,min;
      |                     ^~~
foo.cc:5:25: warning: unused variable 'min' [-Wunused-variable]
    5 |         int s,n,m,r,max,min;
      |                         ^~~
foo.cc:8:15: warning: 'r' is used uninitialized [-Wuninitialized]
    8 |         while(r)
      |               ^

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