ll完成

2019-05-20 19:12:38 +08:00
parent 8d5b098286
commit a02f238ff1
3 changed files with 37 additions and 1 deletions
--- a/utils/math.go
+++ b/utils/math.go
@@ -0,0 +1,9 @@
+package utils
+
+var bit = uint(32 << (^uint(0) >> 63))
+var bitsub1 = bit - 1
+
+func AbsInt(n int) uint {
+	y := n >> bitsub1
+	return uint((n ^ y) - y)
+}