Created
September 27, 2012 21:51
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Turned coins
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| n = 1000; | |
| coins = rep(0, n) | |
| for (i in 2:n) { | |
| whatToFlip = seq(from = i, to = n, by = i) | |
| coins[whatToFlip] = coins[whatToFlip] + 1 | |
| } | |
| sqrt(which(!as.logical(coins%%2))) | |
| # [1] 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 |
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