题解 | #合并表记录# python3
合并表记录
http://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
n = int(input())
dic = dict()
for _ in range(n):
index, val = [int(each) for each in input().split()]
if index not in dic:
dic[index] = val
else:
dic[index] += val
for i in sorted(dic):
print('%d %d'%(i,dic[i]))
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