Compilare: user.cpp: In function ‘long long int solve(std::vector<int, std::allocator<int> >)’: user.cpp:13: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void fill(int, int)’: user.cpp:36: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:79: warning: comparison between signed and unsigned integer expressions user.cpp:88: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long long int’