Compilare: user.cpp: In function 'void read()': user.cpp:32: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[2000000]' user.cpp:33: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[2000000]' user.cpp: In function 'void solve()': user.cpp:63: warning: comparison between signed and unsigned integer expressions user.cpp:69: warning: comparison between signed and unsigned integer expressions