题解 | 成绩

import java.util.*;
public class Main{
    public static void main(String[] args){
        int a,b,c,s;
        Scanner scan = new Scanner(System.in);
        a = scan.nextInt();
        b = scan.nextInt();
        c = scan.nextInt();
        s = (int)(a*0.2+b*0.3+c*0.5);
        System.out.println(s);
    }
}