From 844264c0bc2777d0e952196ab383f1dc004e6f81 Mon Sep 17 00:00:00 2001 From: Jack Sangdahl Date: Thu, 20 Feb 2025 09:50:31 -0700 Subject: 1625. grid paths --- introductory_problems/readme.md | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'introductory_problems/readme.md') diff --git a/introductory_problems/readme.md b/introductory_problems/readme.md index 0046f00..8d11138 100644 --- a/introductory_problems/readme.md +++ b/introductory_problems/readme.md @@ -97,3 +97,10 @@ Consider an infinite string that consists of all positive integers in increasing **Input**: The first input line has an integer `q`: the number of queries. After this, there are `q` lines that describe the queries. Each line has an integer `k`: a 1-indexed position in the string. (Example: 3 7 19 12) **Output**: For each query, print the corresponding digit. (Example: 7 4 1) + +### Grid Paths +There are 88418 paths in a 7 * 7 grid from the upper-left square to the lower-left square. Each path corresponds to a 48-character description consisting of characters D (down), U (up), L (left), and R (right). You are given a description of a path which may also contain certain characters ? (any direction). Your task is to calculate the number of paths that match the description. + +**Input**: The only input line has a 48-character string of characters ?, D, U, L, and R. (Example: ??????R??????U??????????????????????????LD????D?) + +**Output**: Print one integer: the total number of paths. (Example: 201) -- cgit v1.2.3