题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
n = int(input())
map = {}
for i in range(n):
k, v = (int(x) for x in input().split(" "))
if k in map:
map[k] += v
else:
map[k] = v
#按key排序
map = sorted(map.items())
for k, v in map:
print(k, v)
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