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
    let inputArr = []
    let index = 0
    while(line = await readline()){
        if(index >= 1) {
            inputArr.push(line.split(' ').map(parseFloat))
        }
        index++
    }
    let obj = {}
    inputArr.forEach(item => {
        if(Object.keys(obj).includes(item[0].toString())) {
            obj[item[0]] += item[1]
        } else {
            obj[item[0]] = item[1]
        }
    })
    for(i in obj) {
        console.log(i, obj[i])
    }
}()