题解 | #求1+2+3+...+n#
求1+2+3+...+n
http://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1
public class Solution {
int[] nums = {0};
public int Sum_Solution(int n) {
try {
return nums[n];
} catch(Exception e) {
return Sum_Solution(n - 1) + n;
}
}
}拿下
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