Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:8:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘void euler(int)’: user.cpp:21:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘void bfs(int)’: user.cpp:58:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[q[b]].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:72:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&q); ^ user.cpp:74:34: 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:79:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&query[i]); ^