Compilare: main.cpp: In function 'void unire(int, int)': main.cpp:25:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[mare].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:87:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(a[i].size()>afis) afis=a[i].size(); ~~~~~~~~~~~^~~~~ main.cpp:86:8: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=t;i++) ^~~ main.cpp:88:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' fin.push_back(afis); ^~~