Compilare: main.cpp: In function 'void dfsinit(int, int)': main.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[pz].size();++i) ~^~~~~~~~~~~~~ main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[pz].size();++i) ~^~~~~~~~~~~~~ main.cpp: In function 'void dfsdst(int)': main.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[pz].size();++i) ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:35:13: warning: unused variable 'j' [-Wunused-variable] int n,i,j; ^