sortbooks.cpp: In function 'int main()':
sortbooks.cpp:5:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
5 | scanf("%d %d",&n,&m);
| ~~~~~^~~~~~~~~~~~~~~
sortbooks.cpp:9:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
9 | scanf("%d",&b[i]);
| ~~~~~^~~~~~~~~~~~
sortbooks.cpp:14:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
14 | scanf("%d %d %d",&r,&l,&k);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~