Add tasks solutions

1 files changed, 52 insertions, 0 deletions

diff --git a/Practicum/pract05/solutions/Task04.cpp b/Practicum/pract05/solutions/Task04.cpp
new file mode 100644
index 0000000..3fc11a5
--- /dev/null
+++ b/Practicum/pract05/solutions/Task04.cpp
@@ -0,0 +1,52 @@
+/**
+ * Definition for singly-linked list.
+ * struct ListNode {
+ *     int val;
+ *     ListNode *next;
+ *     ListNode(int x) : val(x), next(NULL) {}
+ * };
+ */
+class Solution {
+public:
+    size_t getLen(ListNode* head)
+    {
+        size_t cnt = 0;
+        while(head)
+        {
+            head = head->next;
+            cnt++;
+        }
+
+        return cnt;
+    }
+    ListNode *getIntersectionNode(ListNode *headA, ListNode *headB) {
+        if(!headA || !headB)
+            return nullptr;
+
+        size_t sizeA = getLen(headA);
+        size_t sizeB = getLen(headB);
+
+        while(sizeA > sizeB)
+        {
+            headA = headA->next;
+            sizeA--;
+        }
+
+        while(sizeB > sizeA)
+        {
+            headB = headB->next;
+            sizeB--;
+        }
+
+        while(headA && headB)
+        {
+            if(headA == headB)
+                return headA;
+
+            headA = headA->next;
+            headB = headB->next;
+        }
+        
+        return nullptr;
+    }
+};