题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
count = int(input())
num_dict = {}
for i in range(count):
key, value = map(int,input().split())
if key in num_dict.keys():
num_dict[key] += value
else:
num_dict[key] = value
for key in sorted(num_dict.keys()):
print("%s %s" %(key, num_dict[key]))
