Compilare: user.cpp: In function ‘void precalc()’: user.cpp:30:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < euler.size(); ++i) ~~^~~~~~~~~~~~~~ user.cpp:37:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i + (1<<p) <= euler.size(); ++i) { ~~~~~~~~~~~^~~~~~~~~~~~~~~ user.cpp: In function ‘int lca(int, int)’: user.cpp:52:9: warning: unused variable ‘r’ [-Wunused-variable] int r(0), pas = 14, ans(0); ^ user.cpp:52:15: warning: unused variable ‘pas’ [-Wunused-variable] int r(0), pas = 14, ans(0); ^~~ user.cpp:52:25: warning: unused variable ‘ans’ [-Wunused-variable] int r(0), pas = 14, ans(0); ^~~