Compilare: main.cpp: In function 'void solve()': main.cpp:84:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= n; ++i) ~~^~~~ main.cpp:98:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Vid.size(); ++i) ~~^~~~~~~~~~~~ main.cpp:80:19: warning: unused variable 'lost' [-Wunused-variable] int x, y, z, id, lost = 0; ^~~~ main.cpp: In function 'int posibil(int)': main.cpp:53:47: warning: 'b.node::val' may be used uninitialized in this function [-Wmaybe-uninitialized] return (ui)((long long)val & -(long long) val); ^ main.cpp:58:10: note: 'b.node::val' was declared here node a, b, c; ^ main.cpp: In function 'void update(int)': main.cpp:47:50: warning: 'b.node::val' may be used uninitialized in this function [-Wmaybe-uninitialized] a.val = (ui)((long long)a.val & (-(long long)a.val)); ~~^~~