Is the answer wrong?

  • 0

    When input is 201, the answer is 141.
    However, if you use a brute-force method to count, you will find it should be 120.
    Is that answer wrong?

  • 1

    0~99 there 20 ones;

    100~199 there 100+20 ones;

    200~201 there 1 one.

    So the answer is 141

  • 0

    Thanks for your reply!

    I thought it was counting the numbers containing 1 rather than how many "1"s.
    Thank you!

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