add new solutions

solutions/0/q53/solution.go

@@ -0,0 +1,18 @@
+package q53
+
+import "math"
+
+func maxSubArray(nums []int) int {
+	sum := 0
+	minSubstract := 0
+	maxSubArr := math.MinInt
+	for i := range nums {
+		sum += nums[i]
+		nums[i] = sum
+		maxSubArr = max(maxSubArr, nums[i]-minSubstract)
+		minSubstract = min(minSubstract, nums[i])
+	}
+	return maxSubArr
+}
+
+var _ = maxSubArray