题解 | 求1+2+3+...+n
求1+2+3+...+n
https://www.nowcoder.com/practice/7a0da8fc483247ff8800059e12d7caf1
class Solution {
public:
int Sum_Solution(int n) {
int ans = n;
ans && (ans += Sum_Solution(n -1) );
return ans;
}
};
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