Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:23:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < G[nod].size();i++){ ^ user.cpp:29:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = st;i < G[nod].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:87:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&N,&M); ^ user.cpp:90:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&K); ^ user.cpp:92:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&val); ^ user.cpp:105:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&x,&y,&t); ^