Borderou de evaluare (job #303572)

Compilare: user.cpp: In function ‘int main()’: user.cpp:15:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:46:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:62:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:3:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:4:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:10:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:22:9: warning: ‘elem’ may be used uninitialized in this function [-Wuninitialized]