@[liuletian](/user/758273) 保证 x,nx,n 以及答案都在 64 位无符号整数的表示范围内。
by OoXiao_QioO @ 2022-09-28 18:25:34
```
#include<iostream>
using namespace std;
int main()
{
int x , n ;
long long sum = 1;
cin >> x >> n;
for(int i = 1;i <= n;i++)
sum = sum + sum * x;
cout << sum;
}
```
注意 a 那里要用long long。
by Pikacu @ 2022-09-28 18:28:38
规律题目 https://ricemoon.cn/algorithm/solution/103/
by Roger_Spencer @ 2023-02-07 16:19:22
# //要开long long
```cpp
#include <bits/stdc++.h>
using namespace std;
int main()
{
long long x,n,sum=1,i;
cin>>x>>n;
for(i=0;i<n;i++)
{
sum=sum+sum*x;
}
cout<<sum;
return 0;
}
by 110wwf @ 2023-05-27 20:12:08
30分求助！！！ ~~救命~！！~
by dyx05221129 @ 2023-07-19 15:06:08