题解 | #牛牛的快递#

#include <stdio.h>
int main( )
{
    double k,fee;
    char ch;
    scanf("%lf %c",&k,&ch);
    if(k<=1){
        fee=20;
        if(ch=='y')
            fee+=5;
    }
    else{
        if(k-(int)(k/1)>0){
            fee=20+(int)(k-1)/1+1;
        }
        else{
            fee=20+(k-1)/1;
        }
        if(ch=='y')
            fee+=5;
    }
    printf("%.0lf",fee);
return 0;
}