Compilare: main.cpp: In function 'void kruskal()': main.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(apm.size()==n-1) ~~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:44:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=n;i++) ^~~ main.cpp:46:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' kruskal(); ^~~~~~~