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])
dic[key] = dic.get(key,0) + value #get(key)获取key对应的值，前面出现过的key可以获取到对应值，进行累加
for e in sorted(dic):
print(e,dic[e])
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