题解 | #KiKi算期末成绩#

#include<stdio.h>
int main()
{
	int a = 0;
	int b = 0;
	int c = 0; 
	int d = 0;
	scanf("%d%d%d%d", &a, &b, &c, &d);  
	float sum = a * 0.2 + b * 0.1 + c * 0.2 + d * 0.5;
	printf("%.1f", sum);  
	return 0; 
}