Created
April 8, 2019 19:48
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two sum
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| func twoSum(_ nums: [Int], _ target: Int) -> [Int] { | |
| var dict = [Int: Int]() | |
| for i in 0 ..< nums.count { | |
| if (dict[target - nums[i]] != nil) { | |
| return [dict[target - nums[i]]!, i] | |
| } | |
| dict[nums[i]] = i | |
| } | |
| return [Int]() | |
| } | |
| let nums = [2,7,11,15] | |
| let target = 9 | |
| twoSum(nums, target) |
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