题目描述 Given two postive integers A and B, please calculate the maximum integer C that C*B≤A, and the real number D equal to A/B. 输入格式 Two integers A and B in one line separated by a space.(A,B>0) 输出格式 Output C in one line,followed by D in one line. D
1. 采用归并排序计算逆序数组对的方法来计算右侧更小的元素 time O(nlogn): 计算逆序对可以采用两种思路: a. 在左有序数组元素出列时计算右侧比该元素小的数字的数目为 cnt=r-mid-1; 右有序数组出列完成后cnt=end-mid; b. 在右有序数组元素出列时计算左侧比该元素大的数字的数目为 cnt=mid-l+1; 左有序数组出列完成后cnt=0; 思路参考from https://leetcode-cn.com/problems/count-of-smaller-num
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You are given an integer array nums and you have to return a new countsarray. The counts array has the property where counts[i] is the number of smaller elements to the right of nums[i]. Example: Input: [5,2,6,1] Output: [2,1,1,0] Explanation: To the
java保留两位小数问题: 方式一: 四舍五入 double f = 111231.5585; BigDecimal b = new BigDecimal(f); double f1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); 保留两位小数 --------------------------------------------------------------- 方式二: java.text.DecimalFormat d
转载自 http://blog.csdn.net/com_stu_zhang/article/details/7214565 方法1: float f = 34.232323; BigDecimal b = new BigDecimal(f); float f1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).floatValue(); // b.setScale(2, BigDecimal.ROUND
方法1: float f = 34.232323; BigDecimal b = new BigDecimal(f); float f1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).floatValue(); // b.setScale(2, BigDecimal.ROUND_HALF_UP) 表明四舍五入,保留两位小数 float ft = 134.3435f; int scale = 2