Programming challenges thread

num2word = {0: 'oh', 1:'one', 2:'two', 3:'three', 4:'four', 5:'five', 6:'six', 7:'seven', 8:'eight', 9:'nine', 10:'ten', 11:'eleven', 12:'twelve', 13:'thirteen', 14:'fourteen', 15:'fifteen', 16:'sixteen', 17:'seventeen', 18:'eighteen', 19:'nineteen', 20:'twenty', 30:'thirty', 40:'fourty', 50:'fifty'}

def time2word(h,m):
whatnoon='am'
if h>12:
whatnoon='pm'
h=h%12
if m == 0:
min= ''
elif m

Who the fuck says "oh" for zero

burgerstan

At 3:05, you just say "three five"?

I say "it is eleven twelfth of an hour to four"

that's super fucking unweildy

How about finding the longest word in a string?

Your program should perform the following routine on the number: Arrange the digits in descending order and in ascending order (adding zeroes to fit it to a 4-digit number), and subtract the smaller number from the bigger number. Then repeat the previous step. Performing this routine will always cause you to reach a fixed number: 6174. Then performing the routine on 6174 will always give you 6174 (7641 - 1467 = 6174). Your program should return the number of times this routine must be performed until 6174 is reached. For example: if num is 3524 your program should return 3 because of the following steps: (1) 5432 - 2345 = 3087, (2) 8730 - 0378 = 8352, (3) 8532 - 2358 = 6174.

Input:2111
Output:5

Input:9831
Output:7

not doing your homework

#include
#include
#include
using namespace std;

void getNext(int& n)
{
vector v;
for(int i=0;i

var OP = "stupid KEK"
println("I will not do your homework you " + OP)

>using namespace std;
>int

Attached: moode.png (1137x571, 234K)

Yes, so?

in what region do people say this?

>Performing this routine will always cause you to reach a fixed number: 6174.
8888-8888=0
>0-0=0
0-0=0
>0-0=0
0-0=0
>0-0=0
0-0=0
>0-0=0
0-0=0

Write a program that efficiently lists all duplicate files in a given folder (including all subfolders).

define "duplicate files"

Files that have identical contents are considered duplicates. File names and other file meta-data are not relevant for the purpose of this exercise

oh, for the purpose of this exercise, don't worry about soft or hard links

const arrange = (num) => {
let count = 0, max, min, str, desc, asc;
while(num!=6174) {
desc = Number(String(num).split('').sort((a,b)=>b-a).join(''));
asc = Number(String(num).split('').sort((a,b)=>a-b).join(''));

if(desc>=asc) {
max = desc;
min = asc;
} else {
min = desc;
max = asc;
}

num = max - min;

while(String(num).length

kek

#lang racket

(require racket/match)
(require rackunit)

(define translations
'("" "one" "two" "three" "four" "five" "six" "seven" "eight" "nine"
"ten" "eleven" "twelve" "thirteen" "fourteen" "fifteen"
"sixteen" "seventeen" "eighteen" "nineteen"))
(define translations-tens
'("" "" "twenty" "thirty" "fourty" "fifty"))

(define (challenge hhmm)
(match (map string->number (string-split hhmm ":"))
[(list hh mm)
(string-join
`("It's"
,(list-ref translations (add1 (modulo (sub1 hh) 12)))
,@(cond
[(= mm 0) '()]
[(< mm 10) `("oh" ,(list-ref translations mm))]
[(< mm 20) `(,(list-ref translations mm))]
[else `(,(list-ref translations-tens (floor (/ mm 10)))
,@(if (zero? (modulo mm 10)) '()
'((list-ref translations (modulo mm 10)))))])
,(if (< hh 12) "am" "pm")))]))

(module+ test
(test-equal? "Test 1" (challenge "00:00") "It's twelve am")
(test-equal? "Test 2" (challenge "01:30") "It's one thirty am")
(test-equal? "Test 3" (challenge "12:05") "It's twelve oh five pm")
(test-equal? "Test 4" (challenge "14:01") "It's two oh one pm"))

Attached: racket-logo.png (512x512, 20K)

#lang racket

(define-match-expander regexp
(syntax-rules ()
[(_ re . pats)
(app (λ (x) (regexp-match re x)) (list _ . pats))]))

(define-match-expander div-mod
(syntax-rules ()
[(_ n q-pat r-pat)
(app (λ (x) (quotient/remainder x n)) q-pat r-pat)]))

(define-match-expander ref
(syntax-rules ()
[(_ dict pat)
(app (λ (key) (dict-ref dict key #f))
(and (not #f) pat))]))

;; ------------------------------------------------

(define SMALL-DIGITS
(vector #f "one" "two" "three" "four" "five" "six" "seven"
"eight" "nine" "ten" "eleven" "twelve" "thirteen" "fourteen"
"fifteen" "sixteen" "seventeen" "eighteen" "nineteen"))

(define TENS
(vector #f #f "twenty" "thirty" "fourty" "fifty"))

(define integer->word
(match-lambda
[0 (integer->word 12)] ;; dumb hack
[(ref SMALL-DIGITS x) x]
[(div-mod 10 (ref TENS x) 0) x]
[(div-mod 10 (ref TENS x) (ref SMALL-DIGITS y)) (format "~a ~a" x y)]))

;; ------------------------------------------------

(define challenge
(match-lambda
[(regexp #px"(..):(..)"
(app string->number (div-mod 12 HH hh))
(app string->number mm))
(define hh/str (integer->word hh))
(define mm/str (integer->word mm))
(define tod
(cond
[(= mm 0) hh/str]
[(< mm 12) (format "~a oh ~a" hh/str mm/str)]
[else (format "~a ~a" hh/str mm/str)]))
(define am/pm
(if (zero? HH) "am" "pm"))
(format "It's ~a ~a" tod am/pm)]))

;; ------------------------------------------------

(module+ test
(require rackunit)
(check string=? (challenge "00:00") "It's twelve am")
(check string=? (challenge "01:30") "It's one thirty am")
(check string=? (challenge "12:05") "It's twelve oh five pm")
(check string=? (challenge "14:01") "It's two oh one pm")
)

Attached: backet.png (700x700, 163K)

I think this is from Jow Forumsdailyprogrammer

Even worse.

...

everywhere except the us lol

I haven't heard anyone say it like that and I have never been to the US.
Wait, that's wrong. I have heard Japanese English teachers say it like that, but as they aren't native speakers I don't think that should count.