博客
关于我
A. Cheap Travel
阅读量:533 次
发布时间:2019-03-09

本文共 1453 字,大约阅读时间需要 4 分钟。

Ann has recently started commuting by subway. We know that a one ride subway ticket costs a rubles. Besides, Ann found out that she can buy a special ticket for m rides (she can buy it several times). It costs b rubles. Ann did the math; she will need to use subway n times. Help Ann, tell her what is the minimum sum of money she will have to spend to make n rides?

Input

The single line contains four space-separated integers n, m, a, b (1 ≤ n, m, a, b ≤ 1000) — the number of rides Ann has planned, the number of rides covered by the m ride ticket, the price of a one ride ticket and the price of an m ride ticket.

Output

Print a single integer — the minimum sum in rubles that Ann will need to spend.

Examples

inputCopy
6 2 1 2
outputCopy
6
inputCopy
5 2 2 3
outputCopy
8
Note
In the first sample one of the optimal solutions is: each time buy a one ride ticket. There are other optimal solutions. For example, buy three m ride tickets.

思路:模拟

写的时候被三组数据卡了,批评自己
10 3 5 1
101 110 1 100
100 8 10 1

#include
#include
#include
#include
#include
#include
//#include
using namespace std;typedef long long LL;int main(){ LL n, m, a, b; cin >> n >> m >> a >> b; if (n / m == 0) { if (b < a*n) cout << b << endl; else cout << a * n << endl; } else if (b*1.0 / m >= a) cout << n * a << endl; else { if(b<(n%m)*a) cout << n / m * b + b << endl; else cout << n / m * b + (n%m)*a << endl; } return 0;}

转载地址:http://vboiz.baihongyu.com/

你可能感兴趣的文章
Mysql学习总结(11)——MySql存储过程与函数
查看>>
Mysql学习总结(12)——21分钟Mysql入门教程
查看>>
Mysql学习总结(13)——使用JDBC处理MySQL大数据
查看>>
Mysql学习总结(14)——Mysql主从复制配置
查看>>
Mysql学习总结(15)——Mysql错误码大全
查看>>
Mysql学习总结(16)——Mysql之数据库设计规范
查看>>
Mysql学习总结(17)——MySQL数据库表设计优化
查看>>
Mysql学习总结(18)——Mysql主从架构的复制原理及配置详解
查看>>
Mysql学习总结(19)——Mysql无法创建外键的原因
查看>>
Mysql学习总结(19)——Mysql无法创建外键的原因
查看>>
Mysql学习总结(1)——常用sql语句汇总
查看>>
Mysql学习总结(20)——MySQL数据库优化的最佳实践
查看>>
Mysql学习总结(21)——MySQL数据库常见面试题
查看>>
Mysql学习总结(22)——Mysql数据库中制作千万级测试表
查看>>
Mysql学习总结(23)——MySQL统计函数和分组查询
查看>>
Mysql学习总结(24)——MySQL多表查询合并结果和内连接查询
查看>>
Mysql学习总结(25)——MySQL外连接查询
查看>>
Mysql学习总结(26)——MySQL子查询
查看>>
Mysql学习总结(27)——Mysql数据库字符串函数
查看>>
Mysql学习总结(28)——MySQL建表规范与常见问题
查看>>