题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
nums = int(input())
dict1 = {}
for i in range(nums):
a,b = map(int, input().split())
if a in dict1.keys():
b += dict1[a]
dict1[a] = b
list1 = list(dict1.items())
list1.sort()
for i in list1:
print(f'{i[0]} {i[1]}')
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