Compilare: main.cpp: In function 'int DFS(int, int)': main.cpp:56:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:129:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: At global scope: main.cpp:15:2: warning: 'sol' defined but not used [-Wunused-variable] }sol[1000001]; ^~~