Borderou de evaluare (job #420498)

Compilare: user.cpp: In function ‘int32_t main()’: user.cpp:42:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:56:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:62:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:82:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:96:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:98:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:100:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:101:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:103:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:104:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:40:44: warning: variable ‘ck’ set but not used [-Wunused-but-set-variable] user.cpp:36:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:37:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:39:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]