[MMACTF 2015]pattern-lock
| ID： | 12564 |
|---|---|
| 标题： | [MMACTF 2015]pattern-lock |
| 描述： | In android smartphone, you can use "pattern lock". Pattern lock use 9 dots(3x3) on the screen in the figure below. [image1.png见附件] The following figures are examples of lock pattern. [image2.png见附件][image3.png见附件] Lock pattern must satisfy following three conditions. Use at most once each dot. Use at least 4 dots. Cannot skip the dot on the segment. (Flag 1) Flag is the number of lock patterns in decimal without MMA{...}. (Flag 2) Flag is the maximum length of lock patterns on 4x4 dots. Assume the length of two neighbor dot is 1. Please answer rounded to four decimal places without MMA{...}. (XX.XXXX) 提交时将flag1和flag2拼在一起作为flag。得到的flag使用NSSCTF{}格式提交. |
| 类型： | MISC |
| 网站： | NSSCTF |
| 题目链接： | https://www.nssctf.cn/problem/1073 |
| 赛事： | MMACTF |
| 年度： | 2015 |
| Flag值： | 362880 |
| writeup： | https://qiita.com/nicklegr/items/dd2f0c018261fd2e03c1 |
+on+the+screen+in+the+figure+below.%0A%5Bimage1.png%E8%A7%81%E9%99%84%E4%BB%B6%5D%0AThe+following+figures+are+examples+of+lock+pattern.%0A%5Bimage2.png%E8%A7%81%E9%99%84%E4%BB%B6%5D%5Bimage3.png%E8%A7%81%E9%99%84%E4%BB%B6%5D%0ALock+pattern+must+satisfy+following+three+conditions.%0AUse+at+most+once+each+dot.+Use+at+least+4+dots.+Cannot+skip+the+dot+on+the+segment.%0A(Flag+1)+Flag+is+the+number+of+lock+patterns+in+decimal+without+MMA%7B...%7D.%0A(Flag+2)+Flag+is+the+maximum+length+of+lock+patterns+on+4x4+dots.+Assume+the+length+of+two+neighbor+dot+is+1.+Please+answer+rounded+to+four+decimal+places+without+MMA%7B...%7D.+(XX.XXXX)%0A%E6%8F%90%E4%BA%A4%E6%97%B6%E5%B0%86flag1%E5%92%8Cflag2%E6%8B%BC%E5%9C%A8%E4%B8%80%E8%B5%B7%E4%BD%9C%E4%B8%BAflag%E3%80%82%E5%BE%97%E5%88%B0%E7%9A%84flag%E4%BD%BF%E7%94%A8NSSCTF%7B%7D%E6%A0%BC%E5%BC%8F%E6%8F%90%E4%BA%A4.&flag_value=362880&flag_writeup=https://qiita.com/nicklegr/items/dd2f0c018261fd2e03c1){kind=link}