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class Solution {public:	vector
   
     getRow(int rowIndex) {        // Start typing your C/C++ solution below        // DO NOT write int main() function        vector
    
      ans(rowIndex+2, 0);		vector
     
       tmp(rowIndex+2, 0);		ans[1] = 1;//first row		for(int i = 1; i <= rowIndex; ++i)		{			tmp = ans;			for(int j = 1; j <= i+1; ++j)				ans[j] = tmp[j-1]+tmp[j];		}		ans.erase(ans.begin());//delete prefix zero		return ans;    }};
     
    
   

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