zzulioj 1044: fail rate

Item description
Input n and n student grades (real numbers), and output the fail rate.

Input
The first line of input is an integer n, and the second line is n real numbers, separated by spaces.

Output
Output a real number, which indicates the failing rate, and the result is reserved with 2 decimal places, which is on a separate line.

Sample input Copy
8
98 45 86 79 56 75 90 70
Sample output Copy
0.25

#include<stdio.h>
int main()
{
    
    
	int n,i,m=0;
	double sum;
	scanf("%d",&n); 
	for(i=1;i<=n;i++)
	{
    
    
		scanf("%lf",&sum);
		if(sum<60)
		  m++;
	}
	if(n==0)
	printf("0.00\n");
	else
	printf("%.2lf\n",1.0*m/n);
	return 0;
 }