```
#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b,c;
cin >> a >> b >> c;
cout << a*0.2+b*0.3+c*0.5;
return 0;
}
```
by Leo2020 @ 2021-06-25 10:41:53
`double`:我是干嘛的
by ZBAA_MKC @ 2021-06-25 11:43:06
double：小丑竟是我自己！
float:你抢我台词
by hjl_AK_IOI @ 2021-07-01 21:38:55
把int改成double吧。
by litto1 @ 2022-06-22 22:07:39
用int也可以过
by we_ee @ 2022-08-15 11:23:50
int过得去啊。
~~压行代码（2行）：~~
```cpp
#include <iostream>
int main() { int A, B, C, D; std::cout << (D = (std::cin >> A >> B >> C, A * 0.2 + B * 0.3 + C * 0.5)); }
```
by int_stl @ 2022-12-28 11:21:30