leetcode之Pascal's Triangle
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注意发现规律!
C++实现
class Solution {
public:
vector<vector<int>> generate(int numRows) {
vector<vector<int>> v(numRows);
for(int i=0;i<numRows;i++){
v[i].resize(i+1);
v[i][0] = v[i][i] = 1;
for(int j=1;j<i;j++){
v[i][j] = v[i-1][j-1]+v[i-1][j];
}
}
return v;
}
};
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