class Solution {
public:
vector<int> getRow(int rowIndex) {
vector<int> ans;
ans.push_back(1);
for( int i = 0 ; i < rowIndex ; i++ ) {
ans.insert(ans.begin(),1);
for( int j = 1 ; j < ans.size() - 1 ; j++ ) {
ans[j] = ans[j] + ans[j+1];
}
}
return ans;
}
};
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