题解 | #合并表记录#

import sys

num_pair = int(input())
temp = 0

d = {}

if 1 <= num_pair <=500:
    for i in range(num_pair):
        pair = input()
        index, value = pair.split(' ')
        index, value = int(index), int(value)
        if index < 0 and index > 11111111:
            print("please input right index")
        elif value < 1 and value > 100000:
            print("please input right value")
    
        else:
            if index in d:
                d[index] += value
            else:
                d[index] = value
            
else:
    print("please input right num_pair")

for i in sorted(d.keys()):
    print(f"{i} {d[i]}")