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jdy8739.js
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82 lines (61 loc) ยท 2.06 KB
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/**
* // Definition for a _Node.
* function _Node(val, neighbors) {
* this.val = val === undefined ? 0 : val;
* this.neighbors = neighbors === undefined ? [] : neighbors;
* };
*/
/**
* @param {_Node} node
* @return {_Node}
*/
var cloneGraph = function (node) {
const nodeMap = new Map();
const dfs = (nodeParam) => {
if (!nodeParam) {
return null;
}
if (nodeMap.has(nodeParam.val)) {
return nodeMap.get(nodeParam.val);
}
const clone = new Node(nodeParam.val);
nodeMap.set(clone.val, clone);
for (const nei of nodeParam.neighbors) {
clone.neighbors = [...clone.neighbors, dfs(nei)];
}
return clone;
}
return dfs(node);
};
// ์ฌ๊ท๋ฅผ ํ์ฉํ dfs๋ฅผ ์ฌ์ฉํ ํ์ด
// ์๊ฐ๋ณต์ก๋ O(n + e) -> n(๋
ธ๋์ ์) + e(๊ฐ์ ์ ์) ๋งํผ ํ์์ ์ํ
// ๊ณต๊ฐ๋ณต์ก๋ O(n) -> map์ด ์ด ๋
ธ๋์ ์ ๋งํผ ํฌ๊ธฐ๋ฅผ ๊ฐ์ง
// ------------------------------------
/**
* @param {_Node} node
* @return {_Node}
*/
var cloneGraph = function(node) {
if (!node) {
return null;
}
const clone = new Node(node.val);
const clonedNodeMap = new Map().set(clone.val, clone);
// ์ด queue์๋ ํด๋ก ์ด ์๋๋ผ ์๋ณธ ๋
ธ๋๊ฐ ๋ค์ด๊ฐ์ผํจ(neighbors์ ๋ํ ์ฐธ์กฐ ๋๋ฌธ)
const queue = [node];
while (queue.length > 0) {
const currentNode = queue.pop();
const currentNodeClone = clonedNodeMap.get(currentNode.val);
for (const nei of currentNode.neighbors) {
if (!clonedNodeMap.has(nei.val)) {
clonedNodeMap.set(nei.val, new Node(nei.val));
queue.push(nei);
}
currentNodeClone.neighbors = [...currentNodeClone.neighbors, clonedNodeMap.get(nei.val)];
}
}
return clone;
};
// ํ๋ฅผ ํ์ฉํ bfs๋ฅผ ์ฌ์ฉํ ํ์ด
// ์๊ฐ๋ณต์ก๋ O(n + e) -> n(๋
ธ๋์ ์) + e(๊ฐ์ ์ ์) ๋งํผ ํ์์ ์ํ
// ๊ณต๊ฐ๋ณต์ก๋ O(n) -> map์ด ์ด ๋
ธ๋์ ์ ๋งํผ ํฌ๊ธฐ๋ฅผ ๊ฐ์ง