Compilare: main.cpp: In function 'int DFS(int, int)': main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<mv[x].size();i++) ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<mv[i].size();j++){ ~^~~~~~~~~~~~~ main.cpp:79:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<answer.size();i++) ~^~~~~~~~~~~~~~