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 num = await readline();
   var obj ={};
   for(let i = 1;i<=num;i++){
    let data = await readline();
   
       let key = data.split(" ")[0];
       let value= +data.split(" ")[1];
      
       if(obj[key]){
        obj[key]+= value;
       }else obj[key]= value;
   }
  
  for(item in obj){
    console.log(item+" "+obj[item]);
  }
}()