Constructs a two-dimensional array with 10 rows and 5 columns.Equivalent to 10 elements, each element is still a list, and there are 5 elements in the list;
1. Scheme 1
dp = [[0 for _ in range(5)] for _ in range(10)]
2. Scheme 2
dp=[[0]*5 ]*10
3. Option 3: (a bit shameless, hybrid method, way of making people's mentality)
dp =[[0]*5 for _ in range(10)]
4. Option 4:
dp = [[0 for _ in range(5)]] * 10
I prefer the second method, which is concise and clear.
