62. Unique Paths

A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below).
The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish' in the diagram below).
How many possible unique paths are there?

62. Unique Paths_第1张图片

Above is a 3 x 7 grid. How many possible unique paths are there?
Note: m and n will be at most 100.


public class Solution {
    public int uniquePaths(int m, int n) {
        if(m==0||n==0){
            return 0;
        }
        int paths[] = new int [n];
        paths[0] = 1;
        for(int i = 0; i

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