/
pe174.groovy
executable file
·37 lines (28 loc) · 958 Bytes
/
pe174.groovy
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
#!/usr/bin/env groovy
def _ticks = System.nanoTime()
/**********************************************************************
http://projecteuler.net/index.php?section=problems&id=174
http://keyzero.wordpress.com/2010/04/12/project-euler-problem-174/
*********************************************************************/
def LIMIT = 1000000
def MAX = LIMIT.intdiv(4)+1
def (MINW, MAXW) = [ 3, LIMIT.intdiv(4)+1 ]
def L = new int[LIMIT+1]
Arrays.fill(L,0)
for (width in MINW..MAXW) {
def tiles = (width - 1) * 4
L[tiles]++
def (inner, inside) = [ width - 2, tiles - 8 ]
while ((tiles + inside <= LIMIT) && (inner >= MINW)) {
tiles += inside
L[tiles]++
inner -= 2
inside -= 8
}
}
def answer =
L.toList().findAll { it > 0 && it < 11 }.size()
/********************************************************************/
_ticks = System.nanoTime() - _ticks
println "Answer: $answer"
println "Elapsed: ${_ticks / 1e6} ms"