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18 lines
482 B
V
18 lines
482 B
V
// This example shows 2 solutions for https://projecteuler.net/problem=1 :
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fn gauss_sum(n int) fn (int) int {
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return fn [n] (m int) int {
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return m * ((n - 1) / m) * ((n - 1) / m + 1) / 2
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}
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}
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gs := gauss_sum(1000)
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println('O(1) arithmetic progression sum: ${gs(3) + gs(5) - gs(15)}')
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// A brute force solution, by checking every n in the range:
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mut sum := 0
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for n in 1 .. 1000 {
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if n % 3 == 0 || n % 5 == 0 {
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sum += n
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}
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}
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println('O(n) brute force calculated sum: ${sum}')
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