Create 18 July LCM Triplet (#843)

Author: Chayandas07

18 July LCM Triplet

@@ -0,0 +1,71 @@
+class Solution {
+
+  public:
+
+    int gcd(int a, int b)
+
+        {
+
+        if (a == 0)
+
+            return b;
+
+        return gcd(b % a, a);
+
+    }
+
+  
+
+    long long lcmTriplets(long long N) {
+
+        long long y, x = N, f, s, c = 0;
+
+        if(N == 2 || N == 1)
+
+            return N;
+
+        if(N&1)
+
+            return (N)*(N-1)*(N-2);
+
+        else {
+
+                x -= 2;  y=x;
+
+             while(1 && c < 1)
+
+                {
+
+                    if(gcd(x, N) == 1) {
+
+                         f = x*N*(N-1);
+
+                         ++c;
+
+};
+
+                         --x;
+
+                }c=0;  N=N-1;  --y;
+
+            while(1 && c < 1 ) {
+
+                    if(gcd(y, N) == 1) {
+
+                         s = y*N*(N-1);
+
+                         ++c;}
+
+                    --y;
+
+        }
+
+            
+
+            return max(f, s);
+
+        }
+
+    }
+
+};