题解 | #KiKi算期末成绩#

知识点：运算

#include <iostream>
using namespace std;

int main() {
    int a = 0;
    int b = 0;
    int c = 0;
    int d = 0;
    float result = 0;

    scanf("%d %d %d %d", &a, &b, &c, &d);

    result = a * 0.2 + b * 0.1 + c * 0.2 + d * 0.5;

    printf("%.1f", result);

    return 0;
}