/*
Pascal's Triangle II
Given an index k, return the kth row of the Pascal's triangle.
For example, given k = 3,
Return
Return
[1,3,3,1].
Note:
Could you optimize your algorithm to use only O(k) extra space?
Could you optimize your algorithm to use only O(k) extra space?
*/
class Solution {
public:
vector<int> getRow(int rowIndex) {
// Start typing your C/C++ solution below
// DO NOT write int main() function
vector<int> result;
if(rowIndex==0){
result.push_back(1);
}
int k=0;
vector<int> temp;
while(k < rowIndex){
temp.clear();
temp.push_back(1);
for(int i=1; i<result.size(); i++){
temp.push_back(result[i]+result[i-1]);
}
temp.push_back(1);
result.clear();
result = temp;
k++;
}
return result;
}
};
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