Compilare: user.cpp: In function ‘int main()’: user.cpp:40:8: warning: unused variable ‘t’ [-Wunused-variable] int i,t,n,p,x; ^ user.cpp: In function ‘void DFS(int)’: user.cpp:99:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:42:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n,&S); ^ user.cpp:44:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &p, &x); ^