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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. using ll = long long;
  5. ll dp[100005][5][2];
  6. int main() {
  7. 	ll n;
  8. 	cin>>n;
  9.  
  10. 	dp[1][1][1]=1;
  11. 		dp[1][2][0]=1;
  12. 			dp[1][3][0]=1;
  13. 				dp[1][4][0]=1;
  14.  
  15.  
  16. 				for(ll i=2;i<=n ;i++){
  17. 					dp[i][1][1]=dp[i-1][1][0]+dp[i-1][3][0]+dp[i-1][4][0];
  18. 						dp[i][1][0]=dp[i-1][1][1]+dp[i-1][3][1]+dp[i-1][4][1];
  19.  
  20. 						dp[i][2][1]=dp[i-1][2][1]+dp[i-1][4][1];
  21. 						dp[i][2][0]=dp[i-1][2][0]+dp[i-1][4][0];
  22.  
  23. 							dp[i][3][1]=dp[i-1][1][1]+dp[i-1][3][1];
  24. 							dp[i][3][0]=dp[i-1][1][0]+dp[i-1][3][0];
  25.  
  26. 								dp[i][4][1]=dp[i-1][4][1]+dp[i-1][2][1]+dp[i-1][1][1];
  27. 									dp[i][4][0]=dp[i-1][4][0]+dp[i-1][2][0]+dp[i-1][1][0];
  28. 				}
  29.  
  30. 			cout<<dp[n][1][1]<<"\n";
  31. 	cout<<(dp[n][1][1] + dp[n][2][1] + dp[n][3][1] + dp[n][4][1]);
  32. 	return 0;
  33. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/IMhaWB
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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