2075

leetcode/2075. Decode the Slanted Ciphertext/main.go

@@ -0,0 +1,30 @@
+package main
+
+import "strings"
+
+func decodeCiphertext(encodedText string, rows int) string {
+	if rows == 0 {
+		return ""
+	}
+
+	var (
+		n    = len(encodedText)
+		cols = n / rows
+		sb   strings.Builder
+	)
+
+	for idx := range cols {
+		r, c := 0, idx
+
+		for r < rows && c < cols {
+			sb.WriteByte(encodedText[r*cols+c])
+
+			r += 1
+			c += 1
+		}
+	}
+
+	result := strings.TrimRight(sb.String(), " ")
+
+	return result
+}