题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
import sys
n = int(input())
data = {}
for _ in range(n):
line = input().strip()
index,value = map(int, line.split())
if index in data:
data[index] += value
else:
data[index] = value
for n in sorted(data):
print(f"{n} {data[n]}")
