Compilare: user.cpp: In function 'void buildsol(int, int)': user.cpp:24: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int score(std::deque<std::pair<int, int>, std::allocator<std::pair<int, int> > >&)': user.cpp:34: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void solve(int)': user.cpp:43: warning: comparison between signed and unsigned integer expressions user.cpp:55: warning: comparison between signed and unsigned integer expressions user.cpp:63: warning: comparison between signed and unsigned integer expressions user.cpp:70: warning: comparison between signed and unsigned integer expressions user.cpp:83: warning: comparison between signed and unsigned integer expressions user.cpp:40: warning: unused variable 'k'