Compilare: user.cpp: In function ‘void finise(long long unsigned int)’: user.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=k-cate; i++) ^ user.cpp: In function ‘int main()’: user.cpp:81:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(act<k) ^ user.cpp:63:28: 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:66:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%lld %lld",&b[i],&a[i]); ^