合并表记录——python3解法
合并表记录
http://www.nowcoder.com/questionTerminal/de044e89123f4a7482bd2b214a685201
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
for each in dic:
print(each, dic[each]) 
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