#include<iostream>
using namespace std;
int main(){
    int a,b,c;
    cin>>a>>b>>c;  
    cin>>a>>b>>c;
    cout<<a*0.2+b*0.3+c*0.5;

return 0;
}

就你？菜就多练
```cpp
#include <bits/stdc++.h>
using namespace std;

int main() {
	int a,b,c;
    cin>>a>>b>>c;
	cout<<a/10*2+b/10*3+c/10*5<<endl;
	return 0;
}
```



```cpp
#include <iostream>
int main(){
    int a,he=0;
    for(int i=20;i<=50;(i*=2)-=10){
    	scanf("%d",&a);
    	he+=a*i/100;   
    }
    printf("%d",he);
}
```


吊打其他题解

全部评论 2