Add: Container With Most Water

problems/container-with-most-water/container_with_most_water.go

@@ -1 +1,17 @@
 package container_with_most_water
+
+func maxArea(height []int) int {
+	ans, l, r := 0, 0, len(height)-1
+	for l < r {
+		w, h := r-l, height[l]
+		if h < height[r] {
+			l++
+		} else {
+			h, r = height[r], r-1
+		}
+		if area := w * h; area > ans {
+			ans = area
+		}
+	}
+	return ans
+}

problems/container-with-most-water/container_with_most_water_test.go

@@ -1 +1,27 @@
 package container_with_most_water
+
+import "testing"
+
+type caseType struct {
+	input    []int
+	expected int
+}
+
+func TestMaxArea(t *testing.T) {
+	tests := [...]caseType{
+		{
+			input:    []int{1, 8, 6, 2, 5, 4, 8, 3, 7},
+			expected: 49,
+		},
+		{
+			input:    []int{1, 8, 6, 30, 20, 6, 9, 10, 1},
+			expected: 48,
+		},
+	}
+	for _, tc := range tests {
+		output := maxArea(tc.input)
+		if output != tc.expected {
+			t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)
+		}
+	}
+}