Borderou de evaluare (job #4306)

Compilare: user.cpp: In function ‘int main()’: user.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:21:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:35:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:37:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:46:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:52:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:54:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:63:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:69:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:71:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:80:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:86:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:88:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:97:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]