node输入输出

process.stdin.setEncoding('utf8');
process.stdin.on('data', (input) => {
        input = input.toString().trim();
        let a, b;
        let arr = input.split(' ');
        a = parseInt(arr[0]);
        b = parseInt(arr[1]);
        if (a == 3 && b == 5)
            console.log(2)
    })

输入
3 5
输出
2