Compilare: user.cpp: In function 'void rezolva()': user.cpp:117: warning: comparison between signed and unsigned integer expressions user.cpp:124: warning: comparison between signed and unsigned integer expressions user.cpp:108: warning: unused variable 'nr' /tmp/ccTUOCQW.o: In function `solve()': user.cpp:(.text+0xa7c): warning: the `gets' function is dangerous and should not be used.