Compilare: main.cpp: In function 'void dfs(int)': main.cpp:20:18: 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:68:17: warning: left operand of comma operator has no effect [-Wunused-value] p[t+1]={(1e9+3,0,0)}; ~~~^~ main.cpp:68:22: warning: right operand of comma operator has no effect [-Wunused-value] p[t+1]={(1e9+3,0,0)}; ^