Borderou de evaluare (job #130413)

Compilare: user.cpp: In function ‘int main()’: user.cpp:31:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:62:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:80:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:106:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:137:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:155:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:9:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:10:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:14:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]