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Leetcode Problem 62. Unique Paths
62. Unique Paths
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Leetcode Solutions
Dynamic Programming Approach
Solution Idea
Algorithm Steps
Code Implementation
Complexity Analysis
Initialize a 2D array
dp
with dimensions
m
by
n
and set all values to 1.
Iterate over the array starting from the second row and second column.
For each cell
dp[i][j]
, set its value to
dp[i - 1][j] + dp[i][j - 1]
.
Continue this process until the bottom-right corner of the array is reached.
Return the value at
dp[m - 1][n - 1]
, which represents the number of unique paths to the bottom-right corner.
Mathematical Combinatorics Approach
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