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- #include <iostream>
- #include <vector>
- using namespace std;
- int n;
- void ispisi(vector<int>& v)
- {
- for(int i = 1; i < v.size(); i++)
- cout << v[i] << " ";
- cout << endl;
- }
- void oboj_listu(vector<int>& v, int k)
- {
- if(k == n+1)
- {
- ispisi(v);
- }
- else
- {
- for(int i = 1; i < 4; i++)
- {
- v[k] = i;
- if(v[k] != v[k-1])
- oboj_listu(v, k + 1);
- }
- }
- }
- int main()
- {
- cin >> n;
- vector<int> v(n+1, 0);
- v[0] = 0;
- oboj_listu(v, 1);
- return 0;
- }
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