Borderou de evaluare (job #3661)

Compilare: user.cpp: In function ‘int main()’: user.cpp:23:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:24:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:26:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:29:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:56:16: warning: ‘st’ may be used uninitialized in this function [-Wuninitialized] user.cpp:56:16: warning: ‘dr’ may be used uninitialized in this function [-Wuninitialized]