Compilare: main.cpp: In function 'int main()': main.cpp:87:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int index2 = 0; index2 < tree[savp].chd.size(); index2++) { ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp:90:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int index3 = 0; index3 < tree[tree[savp].chd[index2]].chd.size(); index3++) { ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:92:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index3 != tree[tree[savp].chd[index2]].chd.size() - 1) { ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:126:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int index3 = 0; index3 < tree[savp].chd.size(); index3++) { ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~