python
合并表记录
http://www.nowcoder.com/questionTerminal/de044e89123f4a7482bd2b214a685201
n= int(input())
d = {}
for i in range(n):
ab = input().split(" ")
a,b = int(ab[0]), int(ab[-1])
if a not in d:
d[a] = b
elif a in d:
d[a] = d[a] + b
for i in sorted(d.keys()):
print(i,d[i])
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