SolutionByPrabsimar.cpp

Basic/Calculate Nth Tribonacci Number/SolutionByPrabsimar.cpp

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+//Tribonacci series
+#include <iostream>
+using namespace std;
+int tribonacci(int n)
+{
+    if (n == 1) {
+        return 0;
+    } else if (n == 2) {
+        return 0;
+    } else if (n == 3) {
+        return 1;
+    } else {
+        int a = 0;
+        int b = 0;
+        int c = 1;
+        int ans;
+        for (int i = 4; i <= n; i++) {
+            ans = a + b + c;
+            a = b;
+            b = c;
+            c = ans;
+        }
+        return ans;
+    }
+}
+int main()
+{
+    int num;
+    cout << "enter the num " << endl;
+    cin >> num;
+    cout << tribonacci(num);
+    return 0;
+}