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  1. import sys
  2.  
  3. case = int(sys.stdin.readline())
  4. dic = {}
  5.  
  6. for i in range(case):
  7. age, name = map(str, sys.stdin.readline().split())
  8. if dic.get(age) is not None:
  9. dic[age] += [name]
  10. else:
  11. dic[age] = [name]
  12. for i in sorted(list(dic.keys())):
  13. for j in range(len(dic[i])):
  14. print(i, dic[i][j])
  15.  
Success #stdin #stdout 0.02s 9412KB
stdin
2
9 a
11 b
stdout
11 b
9 a