Compilare: main.cpp: In function 'bool dfs(int)': main.cpp:20:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int findSet(int)': main.cpp:42:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:66:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < s.size(); ++j){ ~~^~~~~~~~~~