feat: 2348. Number of Zero-Filled Subarrays (#225)

Signed-off-by: ashing <[email protected]>

leetcode/2348/2348. Number of Zero-Filled Subarrays.go

@@ -0,0 +1,14 @@
+package _348
+
+func zeroFilledSubarray(nums []int) (ans int64) {
+	c := 0
+	for _, num := range nums {
+		if num == 0 {
+			c++
+			ans += int64(c)
+		} else {
+			c = 0
+		}
+	}
+	return
+}

leetcode/2348/2348. Number of Zero-Filled Subarrays_test.go

@@ -0,0 +1,25 @@
+package _348
+
+import (
+	"testing"
+)
+
+func TestZeroFilledSubarray(t *testing.T) {
+	tests := []struct {
+		nums   []int
+		expect int64
+	}{
+		{[]int{0, 0, 1, 0, 0, 0, 1}, 9},
+		{[]int{0, 1, 0, 1, 0, 0, 1}, 5},
+		{[]int{1, 1, 1, 1, 1}, 0},
+		{[]int{0, 0, 0, 0, 0}, 15},
+		{[]int{}, 0},
+	}
+
+	for _, test := range tests {
+		got := zeroFilledSubarray(test.nums)
+		if got != test.expect {
+			t.Errorf("zeroFilledSubarray(%v) = %v, expect %v", test.nums, got, test.expect)
+		}
+	}
+}