Compilare: user.cpp: In function 'int main()': user.cpp:39: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[2000001]' user.cpp:39: warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[2000001]' user.cpp:71: warning: comparison between signed and unsigned integer expressions