Codeforces Round 597 (Div. 2)___F Daniel and Spring Cleaning —— 数位DP
题目链接：点我啊╭(╯^╰)╮题目大意：给出l，rl，rl，r问满足以下条件的(a,b)(a,b)(a,b)有多少对解题思路：a+b=a⨁ba+b=a\bigoplusba+b=a⨁b=>=>=>aaa&\&&b=0b=0b=0证明：a⨁ba\bigoplusba⨁b为没有进位的二进制加法，a+ba+ba+b为有进位的则若满足a+b=a⨁ba+b=a\bigoplusba+b=a⨁b，则一定满足a