add new solutions

solutions/19/q1984/solution.go

@@ -0,0 +1,17 @@
+package q1984
+
+import (
+	"math"
+	"slices"
+)
+
+func minimumDifference(nums []int, k int) int {
+	slices.Sort(nums)
+	minDiff := math.MaxInt
+	for i := 0; i < len(nums)-k+1; i++ {
+		minDiff = min(nums[i+k-1]-nums[i], minDiff)
+	}
+	return minDiff
+}
+
+var _ = minimumDifference