Create: 133-Clone-Graph.c

c/133-Clone-Graph.c

@@ -0,0 +1,45 @@
+
+/**
+ * Definition for a Node.
+ * struct Node {
+ * int val;
+ * int numNeighbors;
+ * struct Node** neighbors;
+ * };
+ */
+
+struct Node* create_node(int val, int numNeighbors) {
+ struct Node* node = (struct Node*)malloc(sizeof(struct Node));
+ node -> val = val;
+ node -> numNeighbors = numNeighbors;
+ if (numNeighbors > 0) {
+ node -> neighbors = (struct Node**)malloc(numNeighbors * sizeof(struct Node*));
+ } else {
+ node -> neighbors = NULL;
+ }
+ return node;
+}
+
+struct Node* clone_node(struct Node* s, struct Node** hashset) {
+
+ if (s == NULL) return s;
+ if (hashset[(s -> val) - 1] != NULL) return hashset[(s -> val) - 1];
+
+ struct Node* new_node = create_node(s -> val, s -> numNeighbors);
+ hashset[(s -> val) - 1] = new_node;
+ for (int i = 0; i < s -> numNeighbors; i++) {
+ new_node -> neighbors[i] = clone_node(s -> neighbors[i], hashset);
+ }
+ return new_node;
+}
+
+struct Node *cloneGraph(struct Node *s) {
+
+ struct Node** hashset = (struct Node**)malloc(100 * sizeof(struct Node*));
+ for (int i = 0; i < 100; i++) {
+ hashset[i] = NULL;
+ }
+ struct Node* s_clone = clone_node(s, hashset);
+ free(hashset);
+ return s_clone;
+}