foo.cc: In function 'int main()':
foo.cc:8:5: error: 'cin' was not declared in this scope
    8 |     cin>>n;
      |     ^~~
foo.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    1 | #include<cstdio>
  +++ |+#include <iostream>
    2 | #define INT 200010
foo.cc:14:13: warning: unused variable 'j' [-Wunused-variable]
   14 |         int j=0;
      |             ^
foo.cc:15:13: warning: unused variable 'q1' [-Wunused-variable]
   15 |         int q1=2;
      |             ^~

Found 10 testcases.
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