Compilare: main.cpp: In function 'void getdist(int, int)': main.cpp:39:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < leaves.size() - 1; ++i) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:54:42: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] for (int i = (1 << idx); i < (1 << idx + 1); ++i) ~~~~^~~ main.cpp:56:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int leaf = 0; leaf < leaves.size(); ++leaf) if (leaves[leaf].x != u) { ~~~~~^~~~~~~~~~~~~~~ main.cpp:58:8: warning: unused variable 'dst' [-Wunused-variable] int dst = dist[u][lst]; ^~~ main.cpp:65:42: warning: suggest parentheses around '+' inside '<<' [-Wparentheses] for (int i = (1 << idx); i < (1 << idx + 1); ++i) ~~~~^~~ main.cpp:70:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[u].size(); ++i) { ~~^~~~~~~~~~~~~