Compilare: main.cpp: In function 'int main()': main.cpp:34:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (arbint[i-1].size() > 2 * j + 1) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~ main.cpp: In function 'void update(std::vector<std::vector<int> >&, int, int, int)': main.cpp:58:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (arbint[i-1].size() > 2 * index + 1) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:27:9: warning: 'depth' may be used uninitialized in this function [-Wmaybe-uninitialized] int depth; ^~~~~