题解 | #合并表记录#
合并表记录
https://www.nowcoder.com/practice/de044e89123f4a7482bd2b214a685201
a = int(input())
t = {}
while a > 0:
b, c = map(int,(input().split()))
if b in t:
t[b] = t[b] + c
else:
t[b] = c
a = a - 1
for i in sorted(t):
print(i,t[i],end='\n')
