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feat: 트리 순회하기 #26

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feat: 트리 순회하기 #26

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46 changes: 46 additions & 0 deletions 트리/트리 순회하기.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,46 @@
// 1
// 2 3
// 4 5 6 7

const 전위순회 = (nodes, idx) => {
if(idx < nodes.length) {
let course = nodes[idx] + ' ';
course += 전위순회(nodes, idx * 2 + 1);
course += 전위순회(nodes, idx * 2 + 2);
return course;
}

return "";
}

const 중위순회 = (nodes, idx) => {
if(idx < nodes.length) {
let course = 중위순회(nodes, idx * 2 + 1);
course += nodes[idx] + ' ';
course += 중위순회(nodes, idx * 2 + 2);
return course;
}

return ''
}

const 후위순회 = (nodes, idx) => {
if(idx < nodes.length) {
let course = 후위순회(nodes, idx * 2 + 1);
course += 후위순회(nodes, idx * 2 + 2);
course += nodes[idx] + ' ';
return course;
}

return ''
}

function solution(nodes) {
return [
전위순회(nodes,0).slice(0, -1),
중위순회(nodes,0).slice(0, -1),
후위순회(nodes,0).slice(0, -1)
]
}

console.log(solution([1, 2, 3, 4, 5, 6, 7]))