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AtCoder Some Sums (AtCoder Beginner Contest 083) へのコメント

Last updated at Posted at 2021-11-20

問題
https://atcoder.jp/contests/abc083/tasks/abc083_b

13,14,,,などの数字は1+3、1+4,,,と足す必要がある。
数字のままでは13を1と3に分解することができないので、13を一度文字列に変えて1と3に変更する→数字に戻して1と3を足し合わせる必要がある。

N, A, B = map(int, input().split())

answer = 0

for i in range(N+1):
  s = str(i) # 数字の20を文字の20に変える 
  n_list = list(map(int, s)) # 右のlist(~で配列を宣言し、map関数で文字列sをintに変換
  summary = sum(n_list)
  
  if A <= summary <= B # summaryがA以上B以下の時、足す
       answer += i

print(answer)

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