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:56:8: warning: unused variable 'dst' [-Wunused-variable] int dst = dist[u][lst]; ^~~ main.cpp:65:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[u].size(); ++i) { ~~^~~~~~~~~~~~~