Compilare: main.cpp: In function 'void bkt(int)': main.cpp:50:7: warning: unused variable 'del' [-Wunused-variable] int del, x = dude[i].x, y = dude[i].y; ^~~ main.cpp:55:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < branch_ord.size(); ++i) { ~~^~~~~~~~~~~~~~~~~~~