题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
n = int(input())
d ={}
for i in range(n):
index,value = input().split()
d[index] = int(d.get(index,0)) + int(value)
# 字典排序
for key,value in sorted(d.items(),key=lambda x :int(x[0])):
print(key,value)
