题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
n = int(input())
d = {} # 用字典保存键和值
for _ in range(n):
a, b = list(map(int,input().split())) #将输入的字符串，读成int
if a in d:
d[a] += b
else:
d[a] = b
temp = sorted(d.items(), key=lambda x:x[0]) # 对字符串进行排序，是按照首字符排序的
for k, v in temp:
print(k, v)
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