题解 | #整型数组合并#

const readline = require('readline');
 
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

const arr1 = [];
let conut = 0;

rl.on('line', function (data) {
    if( conut % 2 !== 0){
        arr1.push(data.split(" ").map(item=>parseInt(item)))
    }
    conut++
});

rl.on("close",function(){
    const arr2 = [...new Set(arr1.flat().sort((a,b)=>a-b))];
    console.log(arr2.join(""))
})

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