foo.cc: In function 'int Count(Node*)':
foo.cc:280:13: warning: unused variable 'i' [-Wunused-variable]
  280 |         int i;
      |             ^
foo.cc: In function 'int recount(Node*, int)':
foo.cc:305:9: error: declaration of 'int n' shadows a parameter
  305 |     int n=-2147483647;
      |         ^
foo.cc:302:27: note: 'int n' previously declared here
  302 | int recount(Node*head,int n)
      |                       ~~~~^
foo.cc: In function 'int main()':
foo.cc:353:27: warning: unused variable 'c' [-Wunused-variable]
  353 |     int a[10000],b[10000],c[10000];
      |                           ^

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