题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
import sys
record=dict()
n=int(input())
for i in range(n):
content=input().split()
index=int(content[0])
value=int(content[1])
record[index]=record.get(index,0)+value
for key in sorted(record):
print(key,record[key])
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