#include <stdio.h>
int main () {
    int price=0;
    int bill=0;
    printf("请输入金额：");
    scanf("%d",&price);
    printf("请输入票面：");
    scanf("%d",&bill);
    if(bill>=price){
        printf("找零：%d\n",bill-price);
        }
    else{
    printf("金额不足！\n");
        }
    return 0;
}