Compilare: user.cpp: In function ‘void read_and_initialize()’: user.cpp:71: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void create_recursively(int, int, int)’: user.cpp:99: warning: comparison between signed and unsigned integer expressions user.cpp:99: warning: comparison between signed and unsigned integer expressions user.cpp:101: warning: comparison between signed and unsigned integer expressions user.cpp:102: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:155: warning: unused variable ‘ansl’ user.cpp:155: warning: unused variable ‘ansr’ user.cpp: In function ‘int main()’: user.cpp:192: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:193: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:196: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result