前缀和+枚举子集
by _Coffice_ @ 2023-06-17 19:09:26
@[czw20110831](/user/868063)
```cpp
#include<bits/stdc++.h>
using namespace std;
long long int l=1,sumn,a[100];
int main(){
while(cin>>a[l]){
l++;
}
for(int i=1;i<l;i++){
sumn+=a[i];
}
sumn*=pow(2,l-2);
cout<<sumn;
return 0;
}
```
求关
by zhouzihe @ 2023-06-17 19:12:33
已关
@[zhouzihe](/user/798537)
by _Coffice_ @ 2023-06-18 11:12:37