Compilare: main.cpp: In function 'void kruskal(std::vector<std::pair<int, std::pair<int, int> > >&, std::vector<std::pair<int, int> >&, std::vector<int>&, int&)': main.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<adj.size();i++) ~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<t.size();i++) ~^~~~~~~~~ main.cpp: In function 'int findset(int, std::vector<int>&)': main.cpp:13:1: warning: control reaches end of non-void function [-Wreturn-type] } ^