examination.cpp: In function 'int main()':
examination.cpp:6:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    6 |  scanf("%d %d", &n, &q);
      |  ~~~~~^~~~~~~~~~~~~~~~~
examination.cpp:10:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   10 |   scanf("%d %d", &mat, &in);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~
examination.cpp:15:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   15 |   scanf("%d %d %d", &mat, &in, &s);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~