题解 | #牛牛的快递#

#include <stdio.h>
#include <math.h>

int main() {
    float a;
    char b;
    int cost;
    while (scanf("%f %c", &a, &b) != EOF) { // 注意 while 处理多个 case
        // 64 位输出请用 printf("%lld") to 
        if(a <= 1) cost = 20 + (b == 'y' ? 5 : 0);
        else cost = 20 + ceil(a - 1) + (b == 'y' ? 5 : 0);
        printf("%d\n", cost);
    }
    return 0;
}