Compilare: user.cpp: In function ‘void DFS1(int)’: user.cpp:28:30: 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:43:27: 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:106:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<=4*L[i].size();j++) ^ user.cpp:87:30: 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:89:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&val[i]); ^ user.cpp:91:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&a,&b); ^ user.cpp:112:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " ,&t,&x,&y); ^ user.cpp: In function ‘void DFS1(int)’: user.cpp:36:20: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] lant[nod]=nr; ^