题解 | #牛牛的快递#

#include <stdio.h>

int main() {
    // 快递重量
    float a = 0.0f;
    // 表示是否选择加急
    char b = 0;

    while (2 == scanf("%f %c", &a, &b)) {
        printf("%.0f\n", ('y' == b ? 5 : 0) + (a <= 1 ? 20.0 : (20.0 + ((int)(a - 1) - (a - 1) == 0 ?(a - 1) : (int)(a - 1) + 1))));
    }

    return 0;
}