[leetcode]633. Sum of Square Numbers

阿新 • • 發佈：2018-02-28

body ges sum pre -- mat sqrt else 註意

雙指針比較簡單的應用，搜索範圍要註意

public boolean judgeSquareSum(int c) {
        /*
        雙指針，搜索範圍是0到sqrt(c)
         */
        if (c<0) return false;
        int left = 0;
        int right = (int)Math.sqrt(c);
        while (left<=right)
        {
            int cur = left*left+right*right;
            if (c>cur) left++;
             
else if (c<cur) right--;
            else return true;
        }
        return false;
    }

body ges sum pre -- mat sqrt else 註意雙指針比較簡單的應用，搜索範圍要註意 public boolean judgeSquareSum(int c) { /* 雙指針，搜索範圍是0到sqrt(c)

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