题意第二行,lcm(k2l,k2l+1,⋯ ,k2r)\text{lcm}(k^{2^l},k^{2^{l+1}},\cdots,k^{2^r})lcm(k2l,k2l+1,⋯,k2r) 应改为:
lcm(k2l+1,k2l+1+1,⋯ ,k2r+1)\text{lcm}(k^{2^l}+1,k^{2^{l+1}}+1,\cdots,k^{2^r}+1)lcm(k2l+1,k2l+1+1,⋯,k2r+1)
源码:
\text{lcm}(k^{2^l}+1,k^{2^{l+1}}+1,\cdots,k^{2^r}+1)