Compilare: user.cpp: In function ‘void DFS1(int)’: user.cpp:30:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘void DFS2(int)’: user.cpp:58:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:160:24: warning: argument to ‘sizeof’ in ‘void* memset(void*, int, size_t)’ call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess] memset(aint,0,sizeof(aint)); ^ user.cpp:145:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&m); ^ user.cpp:147:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&x,&y); ^ user.cpp:152:54: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " ,&M[i].a,&M[i].b,&M[i].id); ^ user.cpp: In function ‘void DFS1(int)’: user.cpp:46:25: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] lant[nod]=lant[x]; ^