Compilare: main.cpp: In function 'void DFS(int, int, int)': main.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<=vec[x].size()-1;i++) ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<=sol.size()-1;i++) ~^~~~~~~~~~~~~~ main.cpp:76:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<=sol.size()-1;i++) ~^~~~~~~~~~~~~~