Eroare de compilare: user.cpp: In function ‘int read()’: user.cpp:20: error: ‘LONG_MAX’ was not declared in this scope user.cpp:23: error: ‘LONG_MAX’ was not declared in this scope user.cpp:12: warning: unused variable ‘ok’ user.cpp:26: warning: no return statement in function returning non-void user.cpp:13: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int qsort(int, int)’: user.cpp:45: warning: no return statement in function returning non-void user.cpp: In function ‘int sort()’: user.cpp:62: warning: no return statement in function returning non-void user.cpp: In function ‘int solve()’: user.cpp:75: warning: no return statement in function returning non-void