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Aug 22nd, 2019
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  1. class Solution {
  2. public:
  3. int tribonacci(int n){
  4. if(n==0)
  5. return 0;
  6. if(n==1)
  7. return 1;
  8. if(n==2)
  9. return 1;
  10. int dp[38];
  11. dp[0] = 0,dp[1] = 1,dp[2] = 1;
  12. for(int i=3;i<38;i++){
  13. dp[i] = dp[i-1]+dp[i-2]+dp[i-3];
  14. }
  15. return dp[n];
  16. }
  17. };
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