Compilare: user.cpp: In function ‘void read()’: user.cpp:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int dif(std::string, std::string)’: user.cpp:51: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:72: warning: comparison between signed and unsigned integer expressions user.cpp:73: warning: comparison between signed and unsigned integer expressions user.cpp:78: warning: comparison between signed and unsigned integer expressions user.cpp:85: warning: comparison between signed and unsigned integer expressions