diff options
Diffstat (limited to 'daily/287easy/kaprekar.c')
| -rw-r--r-- | daily/287easy/kaprekar.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/daily/287easy/kaprekar.c b/daily/287easy/kaprekar.c index 3121d88..0cf1bf6 100644 --- a/daily/287easy/kaprekar.c +++ b/daily/287easy/kaprekar.c @@ -40,19 +40,14 @@ short desc_digits(short n) return a[0] * 1000 + a[1] * 100 + a[2] * 10 + a[3]; } -short asc_digits(short n) -{ - sort_digits(n); - - return a[3] * 1000 + a[2] * 100 + a[1] * 10 + a[0]; -} - unsigned long long kaprekar(short n) { char i; - for (i = 0; n ^ 6174; i++) - n = desc_digits(n) - asc_digits(n); + for (i = 0; n ^ 6174; i++) { + sort_digits(n); + n = (a[0] - a[3]) * 999 + (a[1] - a[2]) * 90; + } return i; } |