Compilare: user.cpp: In function ‘void read(int)’: user.cpp:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve(int)’: user.cpp:90: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:116: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result