```
#include<iostream>
using namespace std;
int main() {
long long ar[1001], i = 0,cnt=0;
long long sum=0,l=0;
while (cin >> ar[i]) {
cnt++;
i++;
}
for (int j = 0; j < cnt; j++)
{
l=ar[j] << (cnt - 1);
sum += l;
}
cout << sum;
return 0;
}
```
by Lovely_CCCyh___ @ 2023-04-18 21:28:39
试试这样QaQ
```cpp
#include<bits/stdc++.h>
using namespace std;
int main()
{
int a[31],i=0,j;
long long s=0;
while(cin>>a[i++]);
for(j=0;j<i;j++)
{
s+=a[j];
}
s*=pow(2,i-2);
cout<<s;
return 0;
}
```
by _Daniel_ @ 2023-04-18 21:30:43
@[_Daniel_](/user/954175) 谢谢啦，刚刚改好了
by snow_y @ 2023-04-18 22:47:45
@[cyh114514](/user/772909) 谢谢大佬，这样全用long long定义就AC了
by snow_y @ 2023-04-18 22:50:49