Compilare: user.cpp: In function ‘void df3(int, int)’: user.cpp:47:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[in].size(); i ++) { ^ user.cpp: In function ‘int main()’: user.cpp:79:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[aux].size(); i ++) { ^ user.cpp:57:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int k, x, y; fscanf(f, "%d %d", &n, &k); ^ user.cpp:59:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &x, &y); ^