题解 | #合并表记录#

while True:
    try:
        n=int(input())
        index,value=[],[]
        for i in range(n):
            a,b=list(map(int,input().split()))
            if a in index:
                c=index.index(a)
                value[c]+=b
            else:
                index.append(a)
                value.append(b)
        l = list(zip(index,value))
        l.sort()
        for each in l:
            print(each[0],each[1])
    except:
        break