Compilare: main.cpp: In function 'void traverse(int, int, int)': main.cpp:77:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<tree[node].size(); i++){ ~^~~~~~~~~~~~~~~~~~ main.cpp:82:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<ca[left].size(); i++){ ~^~~~~~~~~~~~~~~~ main.cpp:86:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<cb[left].size(); i++){ ~^~~~~~~~~~~~~~~~ main.cpp:91:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<ca[left].size(); i++){ ~^~~~~~~~~~~~~~~~ main.cpp: In function 'void printTree()': main.cpp:135:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<tree[i].size(); j++) ~^~~~~~~~~~~~~~~