I thought that the key solved the problem is awareness of "each roman numeral there is one corresponding number".
I will continue to solve problems and gain experiences, with other people's solutions.
And thanks for introducing books!😍
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Thank you for your helpful reply.
I thought that the key solved the problem is awareness of "each roman numeral there is one corresponding number".
I will continue to solve problems and gain experiences, with other people's solutions.
And thanks for introducing books!😍