add new solutions

solutions/16/q1689/solution.go

@@ -0,0 +1,12 @@
+// Package q1689 implements a solution for https://leetcode.com/problems/partitioning-into-minimum-number-of-deci-binary-numbers/
+package q1689
+
+func minPartitions(n string) int {
+	maxDigit := 0
+	for i := range len(n) {
+		maxDigit = max(maxDigit, int(n[i]-'0'))
+	}
+	return maxDigit
+}
+
+var _ = minPartitions