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08Day-nthTerm.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity >=0.5.0 <0.9.0;
+//There is a series, S , where the next term is the sum of pervious three terms. Given the first three terms of the series, a ,b ,c and respectively, you have to output the nth term of the series.
+contract Day2 {
+//Create a function nthTerm(uint n, uint a, uint b, uint c) where n is the nth term to find and a,b,c are the three terms of the series.
+    function nthTerm(
+        uint256 n,
+        uint256 a,
+        uint256 b,
+        uint256 c
+    ) public pure returns (uint256) {
+        uint256[100] memory arr;
+        uint256 i;
+        //S(n) = a for n=1
+        //S(n) = b for n=2
+        //S(n) = c for n=3
+        //S(n) = S(n-1) + S(n-2) + S(n-3) for n>3
+        arr[1] = a;
+        arr[2] = b;
+        arr[3] = c;
+        for (i = 4; i <= n; i++) {
+            arr[i] = arr[i - 1] + arr[i - 2] + arr[i - 3];
+        }
+        return arr[n];
+    }
+}