Compilare: user.cpp: In function ‘void read()’: user.cpp:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void get_sol(std::vector<int, std::allocator<int> >)’: user.cpp:99: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:70: warning: ‘best.cell::y’ may be used uninitialized in this function user.cpp:70: warning: ‘best.cell::x’ may be used uninitialized in this function