119_Pascal'sTriangleII - a920604a/leetcode GitHub Wiki

class Solution {
public:
    vector<int> getRow(int rowIndex) {
        vector<int> ret{1};
        for(int i=1;i<=rowIndex ; ++i){
            int pre = ret[0];
            for(int j=1;j<i ; ++j){
                int cur = ret[j];
                ret[j] += pre;
                pre = cur;
            }
            ret.push_back(1);
        }
        return ret;
    }
};