21 lines
451 B
Java
21 lines
451 B
Java
package com.leetcode.num;
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/**
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* @file SumNums.java
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* @apiNote 求 1+2+...+n ，要求不能使用乘除法、for、while、if、else、switch、case等关键字及条件判断语句（A?B:C）。
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* https://leetcode-cn.com/problems/qiu-12n-lcof/
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* @author zeekling
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* @version
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* @date 2020-06-02
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*/
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public class SumNums{
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public int sumNums(int n) {
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boolean res = n > 0 && (n += sumNums(n-1)) > 0;
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return n;
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}
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}
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