682. 棒球比赛

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682. 棒球比赛

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leading to the advanced question

Solution Tips

方案一: 模拟

var calPoints = function(ops) {
    let ret = 0;
    const points = [];
    for (const op of ops) {
        const n = points.length;
        switch (op[0]) {
            case '+':
                ret += points[n - 1] + points[n - 2];
                points.push(points[n - 1] + points[n - 2]);
                break;
            case 'D':
                ret += 2 * points[n - 1];
                points.push(2 * points[n - 1]);
                break;
            case 'C':
                ret -= points[n - 1];
                points.pop();
                break;
            default:
                ret += parseInt(op);
                points.push(parseInt(op));
                break;
        }
    }
    return ret;
};