757 finish

Author: aQua

Algorithms/0757.pyramid-transition-matrix/pyramid-transition-matrix.go

@@ -7,15 +7,15 @@ import (
 func pyramidTransition(bottom string, allowed []string) bool {
 	blocks := "#" + strings.Join(allowed, "#")
 
-	var helper func(string, string, int, int) bool
-	helper = func(bottom, blocks string, curr, length int) bool {
+	var dfs func(string, int, int) bool
+	dfs = func(bottom string, curr, length int) bool {
 		if curr+2 > length {
 			bottom = bottom[length:]
 			length = len(bottom)
 			if length == 1 {
 				return true
 			}
-			return helper(bottom, blocks, 0, length)
+			return dfs(bottom, 0, length)
 		}
 
 		b := "#" + bottom[curr:curr+2]
@@ -27,13 +27,13 @@ func pyramidTransition(bottom string, allowed []string) bool {
 			}
 			beg = index + 4
 			color := blocks[index+3 : index+4]
-			if helper(bottom+color, blocks, curr+1, length) {
+			if dfs(bottom+color, curr+1, length) {
 				return true
 			}
 		}
 
 		return false
 	}
 
-	return helper(bottom, blocks, 0, len(bottom))
+	return dfs(bottom, 0, len(bottom))
 }