题解 | 合并表记录
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
n=int(input())
a={}
for i in range(n):
b,c=map(int,input().split())
if b in a.keys():
a[b] += c
else:
a[b]=c
a=sorted(a.items(),key=lambda s:s[0])
#print(a)
for i in a:
print('{} {}'.format(i[0],i[1]))
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