Compilare: main.cpp: In function 'void Unite(int, int, int)': main.cpp:21:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < seg[b].size(); ++i) ~~^~~~~~~~~~~~~~~ main.cpp:32:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < seg[a].size(); ++i) ~~^~~~~~~~~~~~~~~