219. Contains Duplicate II - LeetCode

阿新 • • 發佈：2018-07-19

map leetcode .get -i ins java boolean http contains

Question

219. Contains Duplicate II

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Solution

題目大意：數組中兩個相同元素的坐標之差小於給定的k，返回true，否則返回false

思路：用一個map記錄每個數的坐標，如果數相同，如果坐標差小於k則返回true否則覆蓋，繼續循環

Java實現：

public boolean containsNearbyDuplicate(int[] nums, int k) {
    Map<Integer, Integer> map = new HashMap<>();
    for (int i = 0; i < nums.length; i++) {
        int tmp = nums[i];
        if (map.get(tmp) != null) {
            // System.out.println(i + "---" + map.get(tmp));
            if (i - map.get(tmp) <= k) return true;
        } 
        map.put(tmp, i);
    }
    return false;
}

219. Contains Duplicate II - LeetCode

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219. Contains Duplicate II - LeetCode

Question

Solution

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