题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
import sys
n = int(input())
dic = {}
for i in range(n):
line = input().split()
key = int(line[0])
value = int(line[1])
if key in dic:
dic[key] += value
else:
dic[key] = value
for key in sorted(dic):
print(key, dic[key])
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