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Diffstat (limited to 'week1/Collatz.cs')
| -rw-r--r-- | week1/Collatz.cs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/week1/Collatz.cs b/week1/Collatz.cs new file mode 100644 index 0000000..556a4c4 --- /dev/null +++ b/week1/Collatz.cs @@ -0,0 +1,25 @@ +namespace ALGA { + public class Collatz { + public static int collatz_recursive(int n) { + if (n <= 0) return -1; + if (n == 1) return 0; + if (n % 2 == 0) n /= 2; + else n = n * 3 + 1; + return 1 + collatz_recursive(n); + } + + public static int collatz_iterative(int n) { + if (n <= 0) return -1; + if (n == 1) return 0; + + int steps = 0; + while (n != 1) { + if (n % 2 == 0) n /= 2; + else n = n * 3 + 1; + steps++; + } + return steps; + } + } +} + |