题解 | #牛牛的短信#

#include <stdio.h>

int main() {
    int n = 0;
    while (1 == scanf("%d", &n))
    {
        int word = 0;
        double sum = 0.0;

        for (int i = 0; i < n; i++)
        {
            scanf("%d", &word);
            if (word < 60)
            {
                sum += 0.1;
            }
            else 
            {
                sum += 0.2;
            }
        }

        printf("%.1lf", sum);
    }
    
    return 0;
}