题解 | #牛牛的快递#

#include <stdio.h>

int main() {
    float a, b, c;
    char ji;
    scanf("%f %c", &a, &ji);

    if (ji == 'y')
        c = 1;
    else
        c = 0;

    int e = (int)a;
    if ((a - e) > 0)
    {
        b =e;
    }
    else {
        b = a - 1;
    }

    if (a <= 1)
    {
        printf("%.0f", 20 + c * 5.0);
    }
    else {
        printf("%.0f", c * 5.0 + 20 + b * 1);
    }
    return 0;
}