题解 | #合并表记录#
合并表记录
http://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
num = int(input())
dic = {}
for _ in range(num):
k,v = [int(i) for i in input().split()]
if k in dic:
dic[k] += v
else:
dic[k] = v
dic = dict(sorted(dic.items(), key=lambda x:x[0]))
for k,v in dic.items():
print(k,v)
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