题解 | #合并表记录#

while True:
    try:
        n = int(input())
        indexKey = {}
        for i in range(n):
            a = input().split()
            if a[0] in indexKey:
                indexKey[a[0]].append(int(a[1]))
            else:
                indexKey[a[0]] = []
                indexKey[a[0]].append(int(a[1]))
        for i in range(len(indexKey)):
            minindex = min(list(map(int,indexKey.keys())))
            valsum = sum(indexKey.pop(str(minindex)))
            print('%d %d'%(minindex,valsum))
    except:
        break