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 字符串截取函数,字段截取,字符串截取
查看>>
MySQL 存储引擎
查看>>
mysql 存储过程 注入_mysql 视图 事务 存储过程 SQL注入
查看>>
MySQL 存储过程参数:in、out、inout
查看>>
mysql 存储过程每隔一段时间执行一次
查看>>
mysql 存在update不存在insert
查看>>
Mysql 学习总结(86)—— Mysql 的 JSON 数据类型正确使用姿势
查看>>
Mysql 学习总结(87)—— Mysql 执行计划(Explain)再总结
查看>>
Mysql 学习总结(88)—— Mysql 官方为什么不推荐用雪花 id 和 uuid 做 MySQL 主键
查看>>
Mysql 学习总结(89)—— Mysql 库表容量统计
查看>>
mysql 实现主从复制/主从同步
查看>>
mysql 审核_审核MySQL数据库上的登录
查看>>
mysql 导入 sql 文件时 ERROR 1046 (3D000) no database selected 错误的解决
查看>>
mysql 导入导出大文件
查看>>
mysql 将null转代为0
查看>>
mysql 常用
查看>>
MySQL 常用列类型
查看>>
mysql 常用命令
查看>>
Mysql 常见ALTER TABLE操作
查看>>
MySQL 常见的 9 种优化方法
查看>>