Color each grid with one of three colors: red, yellow, and green, ensuring that adjacent grids have different colors and the number of color schemes can be seen; To obtain the smallest positive number in an integer array, it is necessary to ensure that the cumulative sum is always greater than or equal to 1; A happy string is arranged in Lexicographic order order to see the result; A string s composed of several 0s and 1s can obtain the maximum score that can be obtained by dividing the string into two non empty substrings.