蓝桥杯-历届试题 买不到的数目

问题描述

小明开了一家糖果店。他别出心裁:把水果糖包成4颗一包和7颗一包的两种。糖果不能拆包卖。

小朋友来买糖的时候,他就用这两种包装来组合。当然有些糖果数目是无法组合出来的,比如要买 10 颗糖。

你可以用计算机测试一下,在这种包装情况下,最大不能买到的数量是17。大于17的任何数字都可以用4和7组合出来。

本题的要求就是在已知两个包装的数量时,求最大不能组合出的数字。

输入格式

两个正整数,表示每种包装中糖的颗数(都不多于1000)

输出格式

一个正整数,表示最大不能买到的糖数

样例输入1

4 7

样例输出1

17

样例输入2

3 5

样例输出2

7

此处为隐藏的内容!
发表评论并刷新,才能查看
俊霖

发表评论

您必须

目前评论:9   其中:访客  8   博主  1


    Warning: A non-numeric value encountered in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/comment-template.php on line 20
  1. 点我收录您 2

    Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/default.php on line 566
    • 俊霖 陈俊霖

      Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/default.php on line 566

      @点我收录您

  2. xiaweiyidengwo 4

    Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/default.php on line 566
  3. HJ 3

    Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/default.php on line 566
  4. 当当当当当林森 2

    Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/default.php on line 566
  5. Jim 1

    Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/default.php on line 566
  6. ymx200181 5

    Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/default.php on line 566
  7. Lions 3

    Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/default.php on line 566
  8. 梦醒 4

    Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /www/wwwroot/jurieo.com/wp-content/themes/begin2.0/inc/function/default.php on line 566