Borderou de evaluare (job #420277)

Compilare: user.cpp: In function ‘int main()’: user.cpp:16:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:22:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:22:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:25:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:30:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:33:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:41:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:58:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]