add new solutions

solutions/0/q6/solution.go

@@ -0,0 +1,27 @@
+package q6
+
+import "strings"
+
+func convert(s string, numRows int) string {
+	loopLen := numRows + max(0, numRows-2)
+	rows := make([][]byte, numRows)
+	for i := range numRows {
+		rows[i] = make([]byte, 0, (len(s)/loopLen+1)*2)
+	}
+
+	for i := range len(s) {
+		row := i % loopLen
+		if row >= numRows {
+			row = numRows - row%numRows - 2
+		}
+		rows[row] = append(rows[row], s[i])
+	}
+
+	b := strings.Builder{}
+	for i := range rows {
+		_, _ = b.Write(rows[i])
+	}
+	return b.String()
+}
+
+var _ = convert