Compilare: main.cpp: In function 'int main()': main.cpp:24:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < H[v].size(); i++) ~~^~~~~~~~~~~~~ main.cpp:29:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < H[v].size(); i++) ~~^~~~~~~~~~~~~ main.cpp:23:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] else if (task == 2) ^