function freqQuery(queries) {
    const count = []
    const resultMap = new Map()

    queries.forEach(([operation, value]) => {
        switch (operation) {
            case 1: {
                return resultMap.set(value, (resultMap.get(value) || 0) + 1)
            }
            case 2: {
                return resultMap.get(value) && resultMap.set(value, resultMap.get(value) - 1) 
            }
            case 3: {
                const values = [...resultMap.values()];
                    if (values.indexOf(value) > -1) {
                        count.push(1);
                    } else {
                        count.push(0);
                    }
                }
        }
    })

    return count
}