题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
n = int(input())
dic = {}
for _ in range(0,n):
k,v = map(int,input().split())
if k not in dic:
dic[k] = v
else:
dic[k] = dic.get(k,0) + v
ls = sorted(dic.items())
for k,v in ls:
print(k,v)
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