foo.cc: In function 'long long int change(int, int, long long int, int, int, int)':
foo.cc:18:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   18 |         int mid = cl + cr >> 1;
      |                   ~~~^~~~
foo.cc: In function 'int main()':
foo.cc:29:16: warning: unused variable 'i' [-Wunused-variable]
   29 |         int n, i, q, l, r, p;
      |                ^

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