Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:15:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph1[node].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:60:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<Graph2[node].size();j++) ^ user.cpp:33:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&N); ^ user.cpp:36:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&c[i]),walk[i]=i; ^ user.cpp:40:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&X); ^ user.cpp:47:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&Y); ^