题解 | 合并表记录
import sys
n = int(input())
d = {}
for i in range(n):
x,y = map(int,input().split())
if x not in d:
d[x] = y
else:
d[x] += y
for i in sorted(d):
print(i, d[i], sep = " ")
import sys
n = int(input())
d = {}
for i in range(n):
x,y = map(int,input().split())
if x not in d:
d[x] = y
else:
d[x] += y
for i in sorted(d):
print(i, d[i], sep = " ")
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