foo.cc: In function 'void down(int, int, int)':
foo.cc:40:13: warning: unused variable 'm' [-Wunused-variable]
   40 |         int m = L + (R - L) / 2;
      |             ^
foo.cc: In function 'void solve(int, int)':
foo.cc:72:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   72 |         scanf("%d %d %d", &c, &a, &b);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
foo.cc: In function 'void init(int, int)':
foo.cc:82:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   82 |         scanf("%d", &data[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:87:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   87 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~

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