题解 | 合并表记录

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    // Write your code here
    await readline()
    const map = new Map()
    let key = 0
    let value = 0
    while(line = await readline()) {
        const arr = line.split(" ")
        key = Number(arr[0]), value = Number(arr[1])
        map.set(key,(map.get(key) || 0) + value) 
    }
    const res = Array.from(map.entries()).sort((a,b) => a[0] - b[0])
  
     res.forEach((value) => {
        console.log(value[0],value[1])
     })

}()