Score a domain for DGA likelihood

Challenge

Combine features into one score:

int dga_score(const char *label);

With L=strlen (return 0 if L==0), cr=longest consonant run, digits=count of ASCII digits, vowels=count of vowels (case-insensitive):

• T1 = 10*cr, capped at 40
• T2 = (digits*50)/L
• T3 = ((vowels*100)/L < 20) ? 20 : 0
• score = T1 + T2 + T3, capped at 100

All divisions are integer. Return score.

Input format

A domain label string.

Output format

Integer score 0-100.

Constraints

Use integer arithmetic exactly as specified so the score is deterministic.

Starter code

#include <stddef.h>
/* DGA score 0..100 by the EXACT formula (all integer division):
   L=strlen (return 0 if L==0); cr=longest consonant run; digits=#ASCII digits;
   vowels=#vowels(aeiou, case-insensitive);
   T1=10*cr, cap at 40; T2=(digits*50)/L; T3=((vowels*100)/L < 20)?20:0;
   score=T1+T2+T3, cap at 100. */
int dga_score(const char *label){ (void)label; return 0; }

Common mistakes

Using floating point (rounding drift); forgetting to cap T1 at 40 or the score at 100.

Edge cases to handle

Empty label -> 0; a very consonant/digit-heavy label approaches 100.

Background lessons

• Score a domain for DGA likelihood