Merge pull request #117 from NovaHe/master

fix 167: clean up redundant code

leetcode/0167.Two-Sum-II---Input-array-is-sorted/167. Two Sum II - Input array is sorted.go

@@ -6,13 +6,14 @@ func twoSum167(numbers []int, target int) []int {
 	for i < j {
 		if numbers[i]+numbers[j] == target {
 			return []int{i + 1, j + 1}
-		} else if numbers[i]+numbers[j] < target {
+		}
+		if numbers[i]+numbers[j] < target {
 			i++
 		} else {
 			j--
 		}
 	}
-	return []int{-1, -1}
+	return nil
 }
 
 // 解法二 不管数组是否有序，空间复杂度比上一种解法要多 O(n)
@@ -20,8 +21,8 @@ func twoSum167_1(numbers []int, target int) []int {
 	m := make(map[int]int)
 	for i := 0; i < len(numbers); i++ {
 		another := target - numbers[i]
-		if _, ok := m[another]; ok {
-			return []int{m[another] + 1, i + 1}
+		if idx, ok := m[another]; ok {
+			return []int{idx + 1, i + 1}
 		}
 		m[numbers[i]] = i
 	}

leetcode/0169.Majority-Element/169. Majority Element.go

@@ -6,12 +6,11 @@ func majorityElement(nums []int) int {
 	for i := 0; i < len(nums); i++ {
 		if count == 0 {
 			res, count = nums[i], 1
+		}
+		if nums[i] == res {
+			count++
 		} else {
-			if nums[i] == res {
-				count++
-			} else {
-				count--
-			}
+			count--
 		}
 	}
 	return res