add new solutions

solutions/4/q443/solution.go

@@ -0,0 +1,39 @@
+package q443
+
+func compress(chars []byte) int {
+	seqLen := 0
+	char := chars[0]
+
+	p := 1
+
+	writeNumber := func(num int) {
+		i := 1
+		for ; i*10 <= num; i *= 10 {
+		}
+		for ; i > 0; i /= 10 {
+			chars[p] = byte(num/i) + '0'
+			p++
+			num %= i
+		}
+	}
+
+	for _, c := range chars {
+		if c == char {
+			seqLen++
+		} else {
+			char = c
+			if seqLen > 1 {
+				writeNumber(seqLen)
+			}
+			seqLen = 1
+			chars[p] = char
+			p++
+		}
+	}
+	if seqLen > 1 {
+		writeNumber(seqLen)
+	}
+	return p
+}
+
+var _ = compress