diff options
| author | mzuenni <michi.zuendorf@gmail.com> | 2024-08-30 15:04:20 +0200 |
|---|---|---|
| committer | mzuenni <michi.zuendorf@gmail.com> | 2024-08-30 15:04:20 +0200 |
| commit | ac2d9ad3f2c88bc12420fc439e8d0b4775a11169 (patch) | |
| tree | 256c13ae0a321e3a705bde52ee679131b9f864d5 /content/other/josephus2.cpp | |
| parent | 00b01a954304e50904de97b25639c535e16f259e (diff) | |
various small improvements
Diffstat (limited to 'content/other/josephus2.cpp')
| -rw-r--r-- | content/other/josephus2.cpp | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/content/other/josephus2.cpp b/content/other/josephus2.cpp index 5086e13..33544ea 100644 --- a/content/other/josephus2.cpp +++ b/content/other/josephus2.cpp @@ -1,8 +1,5 @@ int rotateLeft(int n) { // Der letzte Überlebende, 1-basiert. - for (int i = 31; i >= 0; i--) { - if (n & (1 << i)) { - n &= ~(1 << i); - break; - }} - n <<= 1; n++; return n; + int bits = __lg(n); + n ^= 1 << bits; + return 2 * n + 1; } |