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 line1 = await readline();
    const num = parseInt(line1);
    
    let obj = {}
    while(line = await readline()){
        let tokens = line.split(' ');
        let a = parseInt(tokens[0]);
        let b = parseInt(tokens[1]);
        if(obj[a]){
            obj[a] += parseInt(b)
        } else {
            obj[a] = parseInt(b)
        }
    }

    for (let a in obj){
        console.log(a + ' ' + obj[a] );
    }

}()