結果

問題 No.806 木を道に
ユーザー watarimaycry2
提出日時 2020-10-24 18:03:32
言語 JavaScript
(node v23.5.0)
結果
AC  
実行時間 1,420 ms / 2,000 ms
コード長 2,423 bytes
コンパイル時間 138 ms
コンパイル使用メモリ 6,816 KB
実行使用メモリ 86,692 KB
最終ジャッジ日時 2024-07-21 15:22:27
合計ジャッジ時間 11,968 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 2
other AC * 27
権限があれば一括ダウンロードができます

ソースコード

diff #

//Don't have to see. start------------------------------------------
var read = require('readline').createInterface({
	input: process.stdin, output: process.stdout
});
var obj; var inLine = [];
read.on('line', function(input){inLine.push(input);});
read.on('close', function(){
	obj = init(inLine);
	console.error('\n↑入力 ↓出力');
	Main();
});
function makeClone(obj){return (obj instanceof Set) ? new Set(Array.from(obj)) : JSON.parse(JSON.stringify(obj));}
function nextInt(){return myconv(next(),1);} function nextStrArray(){return myconv(next(),2);}
function nextIntArray(){return myconv(next(),4);} function nextCharArray(){return myconv(next(),6);}
function next(){return obj.next();} function hasNext(){return obj.hasNext();}
function init(input){  
	return {
		list : input, index : 0, max : input.length,
		hasNext : function(){return (this.index < this.max);},
		next : function(){if(this.hasNext()){return this.list[this.index++];}else{throw 'ArrayIndexOutOfBoundsException ‚There is no more input';}}
	};
}
function myout(s){console.log(s);}
function myerr(s){console.error('debug:' + require('util').inspect(s,false,null));}
//param "no" is
//unknown or outlier : return i. 1: parseInt.
//2: split space. 4: split space and parseInt.
//6: split 1 character. 7: split 1 character and parseInt.
//8: join space. 9: join nextline. 0: join no character.
function myconv(i,no){try{switch(no){case 1:return parseInt(i);case 2:return i.split(' ');case 4:return i.split(' ').map(Number);case 6:return i.split('');case 7:return i.split('').map(Number);case 8:return i.join(' ');case 9:return i.join('\n');case 0:return i.join('');default:return i;}}catch(e){return i;}}

//Don't have to see. end------------------------------------------
function Main(){
	var N = nextInt();
	var list = new Array(N);
	for(var i = 0; i < N; i++){
		list[i] = {
			child : new Set(),
			access : false
		};
	}
	for(var i = 0; i < N - 1; i++){
		var tmp = nextIntArray();
		list[tmp[0] - 1].child.add(tmp[1] - 1);
		list[tmp[1] - 1].child.add(tmp[0] - 1);
	}
	var output = 0;
	var queue = [0];
	list[0].access = true;
	while(queue.length > 0){
		var now = queue.shift();
		output += Math.max(0, list[now].child.size - 2);
		var child = Array.from(list[now].child);
		for(var i = 0; i < child.length; i++){
			if(!list[child[i]].access){
				list[child[i]].access = true;
				queue.push(child[i]);
			}
		}
	}
	myout(output);
}
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