foo.cc: In function 'int main()':
foo.cc:13:16: warning: unused variable 'cnt' [-Wunused-variable]
   13 |  int b[100005],cnt=0,k=1;
      |                ^~~
foo.cc: In function 'int search(int*, int, int)':
foo.cc:42:1: warning: control reaches end of non-void function [-Wreturn-type]
   42 | }
      | ^

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