| 1234567891011121314151617181920212223242526272829 |
- #lang racket
- (define in (open-input-file "input"))
- (define (read-num)
- (define line (read-line in))
- (string->number
- (apply
- string-append
- (string-split
- (cadr (string-split (string-trim line) ":"))))))
- (define time (read-num))
- (define distance (read-num))
- (define (calc time hold-time)
- (* hold-time (- time hold-time)))
- (define (solve time distance)
- (define (loop counter hold-time)
- (if (> hold-time time)
- counter
- (if (> (calc time hold-time) distance)
- (loop (+ 1 counter) (+ 1 hold-time))
- (loop counter (+ 1 hold-time)))))
- (loop 0 0))
- (display (solve time distance))
- (newline)
|
