Submission #63033450

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Source Code Expand

import * as fs from 'fs';

let _pendingInput = "";
const _decoder = new TextDecoder();
function input(): string {
    while (true) {
        const nl = _pendingInput.indexOf("\n");
        if (nl >= 0) {
            const line = _pendingInput.substring(0, nl); // 改行含まず
            _pendingInput = _pendingInput.substring(nl + 1);
            return line;
        }
        const stdin = 0;
        const buf = new Uint8Array(1024);
        const nread = fs.readSync(stdin, buf);
        if (nread > 0) {
            const bufView = new Uint8Array(buf.buffer, 0, nread);
            _pendingInput += _decoder.decode(bufView, { stream: true });
        } else {
            // EOF
            // 競プロでは事前に行数が分かっている想定なので、それ以上読もうとするのはエラー
            // 改行で終わっていないテキストがあった場合、それは返さない
            // _pendingInput += _decoder.decode();
            // return null;
            throw new Error('Unexpected EOF');
        }
    }
}

function isok(s: string) {
    const stack: string[] = []
    for (let i = 0; i < s.length; i++) {
        const c = s[i]
        switch (c) {
            case "(":
            case "[":
            case "<":
                stack.push(c)
                break;
            case ")":
                if (stack.pop() != "(") {
                    return false;
                }
                break;
            case "]":
                if (stack.pop() != "[") {
                    return false;
                }
                break;
            case ">":
                if (stack.pop() != "<") {
                    return false;
                }
                break;
        }
    }
    return stack.length == 0;
}

function main() {
    const s = input()
    console.log(isok(s) ? "Yes" : "No");
}

main();

Submission Info

Compile Error

Judge Result