Compilare: user.cpp: In function 'void read()': user.cpp:18: warning: use of 'll' length modifier with 'f' type character user.cpp:22: warning: use of 'll' length modifier with 'f' type character user.cpp:25: warning: use of 'll' length modifier with 'f' type character user.cpp:16: warning: unused variable 'i' user.cpp: In function 'void solve()': user.cpp:107: warning: use of 'll' length modifier with 'f' type character