Compilare: user.cpp: In function ‘void D(int)’: user.cpp:6:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(int j=0;j<w[i];j++) ^ user.cpp: In function ‘int main()’: user.cpp:12:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%u",&n); ^ user.cpp:14:63: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%u%u%u",&a[i],&b[i],&c[i]),w[a[i]]++,w[b[i]]++; ^