Pascal's Triangle II

class Solution:
    def getRow(self, rowIndex: int) -> List[int]:
        row = [1]
        for i in range(rowIndex):
            row = [1] + [row[j] + row[j + 1] for j in range(len(row) - 1)] + [1]
        return row

class Solution {
public:
    vector<int> getRow(int rowIndex) {
        vector<int> row(rowIndex + 1, 1);
        for (int i = 1; i <= rowIndex; i++) {
            for (int j = i - 1; j > 0; j--) {
                row[j] = row[j] + row[j - 1];
            }
        }
        return row;
    }
};

function getRow(rowIndex: number): number[] {
    const row = new Array(rowIndex + 1).fill(1);
    for (let i = 1; i <= rowIndex; i++) {
        for (let j = i - 1; j > 0; j--) {
            row[j] = row[j] + row[j - 1];
        }
    }
    return row;
}