Compilare: user.cpp: In function ‘void Get_Back(int, int, int)’: user.cpp:26:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph[vertex].size();i++) ^ user.cpp: In function ‘void Get_Low(int)’: user.cpp:36:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Back[vertex].size();i++) ^ user.cpp: In function ‘void Mark_Edges(int, int)’: user.cpp:48:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<T[vertex].size();i++) ^ user.cpp: In function ‘void Get_Comp(int, int)’: user.cpp:65:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<T[vertex].size();i++) ^ user.cpp: In function ‘void Get_BCC(int)’: user.cpp:71:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<T[vertex].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:107:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<Out[i].size();j++) ^ user.cpp:84:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&N,&M); ^ user.cpp:88:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&X,&Y); ^