Compilare: user.cpp: In function ‘int main()’: user.cpp:80:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < cc[i].size(); ++j) { ^ user.cpp:83:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < g[x].size(); ++k) { ^ user.cpp: In function ‘void Kruskal()’: user.cpp:109:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < edges.size(); ++i) { ^ user.cpp: In function ‘void dfs(int)’: user.cpp:137:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[x].size(); ++i) { ^