Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:15:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<graph[v].size();i++) ^ user.cpp: In function ‘void agat(int, int)’: user.cpp:36:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<graph[v].size();i++) ^ user.cpp:26:9: warning: unused variable ‘nval’ [-Wunused-variable] int nval,auxt,auxv; ^ user.cpp: In function ‘int main()’: user.cpp:60:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<graph[1].size();i++) ^