int Sum_Solution(int n) {
int res=n;
res && (res+=Sum_Solution(n-1));
return res;
}
return n and n + self.Sum_Solution(n-1)
int Sum_Solution(int n) {
int res=n;
res && (res+=Sum_Solution(n-1));
return res;
}
return n and n + self.Sum_Solution(n-1)
本文标题:2019-08-14 剑指 求1+2+3+...+n
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