1137. N-th Tribonacci Number

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Fri Apr 21 2023 08:27:04 GMT+0000 (Coordinated Universal Time)

Saved by @Ranjan_kumar #c++

class Solution {
public:
    int tribonacci(int n) {
        int dp[n+4];
        for(int i=0;i<n+1;i++)
        {
            dp[i]=-1;
        }
        dp[0]=0;
        dp[1]=1;
        dp[2]=1;
        for(int i=3;i<n+1;i++)
        {
            dp[i]=dp[i-1]+dp[i-2]+dp[i-3];
        }
        return dp[n];
    }
};
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https://leetcode.com/problems/n-th-tribonacci-number/