题解 | #合并表记录#

let num = parseInt(readline())

let obj = {}
for(let i= 0; i<num; i++) {
    const [k, v] = readline().split(' ')
    if (!obj[k]) {
        obj[k] = +v
    } else {
        obj[k] += +v
    }
}

Object.keys(obj).forEach((el) => {
   console.log(`${el} ${obj[el]}`)
})