Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:31:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph[node].size();i++) ^ user.cpp:47:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sons[node].size();i++) ^ user.cpp:53:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sons[node].size();i++) ^ user.cpp:56:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<sons[node].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:65:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&N,&K); ^ user.cpp:69:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&X); ^ user.cpp:75:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&X,&Y); ^