Compilare: user.cpp:81:2: warning: no newline at end of file user.cpp: In function 'void rk()': user.cpp:53: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:69: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[2000001]' user.cpp:70: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[2000001]'