题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
a = int(input())
b = {}
for i in range(a):
key = input().split(" ")
k = int(key[0])
v = int(key[1])
try:
b[k] += v
except KeyError:
b[k] = v
# 按键升序排序并输出
for k in sorted(b):
print(k, b[k], end="\n")
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