第二十一章 回溯(3/4)
qs2R+qoa0ZE01ez1dN+8/pNxZMhzF6i9VTzsV/0y4xU3tnfxvynXhIGwp/SvPvhVF/7dIKUSQ3EF7JNstUdPQVQejtaEo8M9NgHzzL9IIJ3Nnp1SLeeVlKJ0HbRXYW1GJ13m/NjnmHGv4e0MrL0zMHXkNUTT7F7GJkEXfyCtgEXIitGPBI4e8dpZK7qoiC+QdTNM/Bu+dBRPy5oSS6kk6wfA0eLmUONfau2HLMF88s+3U0Agfr9wh+O3HNyvLW7/bE9D09W4cKjpQkAQ4cgABvdXjBzrMZ+dC3ALjBOyMWA5mVIqzZ5Piom+pGky5AFFDv7/dqwesJCSryBTEmpk3Oyfb/z7xpuwDmU65aA2vfutxVwNVQuy6HLalWvumcV7FX0drCtFvvg5vbmAwN0Do3fRAGVSE71/AioAQU8n+dQn8GEkqUB1/fzJiqrRDLzDah3z2akvNc4AQlu7D2eXttqrxh57JqBtsuYfc3ftdvHqhKXfxxGdRzdLv6VN5WYuaA+f+qd7CTZmhbNVES55F6Y0H5q7Aumq3KrUXVzaDvMvkSWKjAbdIWSRNUI6CsYEbXTHNje1zrU7d5aKO3tWlPGpC0KVC4wofPmoxk3QdFiB/KkzNeGOk7+61ZDMg5ksZJ5lr+ROa8d2sk6Bxy6W1iRrYxsIiIqQ4pXefn+yZx77fJHEWnV2Nk8Es1irOLq7LwZaPWQr4q14qSZWkdkvWWZwJWB9s8c8CMUKvv2RCNjqAMRftUlnxH0Y1t+F5KhGAhjlLBVp+2rvodce2HY/xffkgeIaX+yGWVy2h7gMk9gysksXi/V35EyGVNfSJ+mlK/NEXzgQ14GICFy9yhg3u3lob93U94tQgNEFgBZ9B7hsSmjkjFolkUXhuCjuLhebvATfXDLG3mzYoCQe8RYdbeL7ssRifCqucMTLS0/1K0PLSHoA6CgLort9P0jCLf+J3M26VqdAanAXJAbEy14eUn2OaIcoabIAWdgl0M/BqYzJrbjDjoXjN0DtbnBFfxqR75T7RCK5pPwJA4p7+AfsR6IJmV4Yjo7DRmcqI7o8Lw4TdMG0V1zuO6w7uj2Z9/BzEqKVjhK78ZHNoTUPGkwXSvZ+U5owy879A3aRcqZR5kUvwwtbafduUQ7fR5Q4lhpB/GAEbezC6/qIxUC2kikvciIHXrB86B04qIUluELJvoK3jGocF+1xiKFFip4HJdJkfbwAwF+32+QJjPESjym12HgERBMUiBBteFejZzBv5bPsQqA8aQF1sR9TdKcMs8Hnvdikf8QF7KxoaW1xtuclKrFP7dkxbBtZFGq/XfbHRqeAnfnO41VJxZXd24Wvjm71TxHCWAtFi2q4tuizvBAaVG+58crsQvwuQr5yr6ZHZGAFo8fbsml9+RvGJkjAuCJQyzzVTPTHkjMA5WGhDJUKK4ATzx5aeIz3IeL+NeY4T4389piVnPjxNJUn1R44m7BhuAXNNsGhJescbJnd9z/iXSvJgwxv+e7Ub01gpEojPDD/qaeCVS92VKPyCXwq9gTkOeK+3vkpA9HKZkw9/TgfJcWep0bqju2T2vCGNZmhmxxkct+AjiSF+3eDnIj4VDGWHMh2y8kQImqJlHoevaNe7QwgyFva+GcDc8R1rkPvmShOCbH4AAoZJCHXhWFq7hp6AeQBRZAA9RlPzKw71a+VIdSAhLN9c+MMmWlUDVdn0E+WcMNUBrBz9FBAkuoJ8vGjWdwAuhCezmT03JEx+no7dcMDL7UcdEuJv3ezAh1k6Fe0WGgsOsfLcaNFv9wli3D+IHfHyByS6/vo3BkX9VkYrv1v/KVqBiqEVxUYEsrZYZ3tnCTqZyLLzWE76tvII17ZT35/e3AFeB1PgDfFXxI7kAstCby0k/qYQYW5YC6+3LR4pdFKKudw9mmFKVl4OqpCXHjsnvvQv/O2mKrHbwjqdUHp8hsDPC4BOTRs9i8fogyFu6KDswKAVWwaZwNwWsgmmDQPrgIaAGZs3MewDMqfGfd6FBtc0ImxADaB7kWorQ3HnFxEjepbGxDqndCKUq+VlqbxJeTlmzn5G1e4VSiG17CHJzgec6EAnYNdg3MPW4sNK9orO0C+zzw35Oslnxc035uCSy9sn5mamBiMNpCyJA7JJvn8ocl8tRCPuXKH9SDHpo8JCfRU/s9GfQMc2MmAdpEc/CULNkBAs2de3qojg2xCiVFBvEfmQG1KLd537BqX150n6qxtL845CT9FwhTWCyDcB3WS6sZ6w+d5BKR6+YbUyzmSuLtLG7SnsCjvSNNAgrFqbppoTDOrDejHjheJK45cFZbI5xlX0VRd+JafrVtK+711Rcvx5TiduE3KvumdAn6i8WIz1bcS5xHJ0nKSK+UB0BQw25X283tlZ5uPKIJ8WTBbjUd4xTcIPgKFn7VYU5dczVXo0ES+sbltEc4WQJuziU0AQe1kS51Z3W15Z8m0r3obW80wK1c/PAs5pKJ+CtCXvErzKwDWeUWHHy42vz8pr6e28tu0w0ShWMuVXixfDqBuTY+dVTi+rukhS/NcIgcwJxdr9t64egxmkfW84MbsUr5PXW1T2Fv1TS96exh98O9T6Qu+Bc5xvMM+cZLd/2eeX0VGitkj2+QOzJIVFjv4uPNOFEbNWMNPGLntBoLvs855OR6KWZ/6zc1PWR7qKBeCJNtfRqAJTE1Ot3QijgSfRzwiHIXDCLs64VNprVYZXLR+LDKUTdv5+NjIsVW8Xe+g3kGjgJ/JjuuAErLc8wskYTdSKWLkWIUGgX4+dYa9HWWKge3D4XvTbgwh4kBqK0vUpxXaH7pwBOb2SBvdrd0FDRFZZINHgBNRVdl6e9gPTblgbkEVvT1TovSX3wPylnnSuhV7hmmZJ4XqBNSkCT621mJyqrWgl3WzfRmetN9RVRDL4qI0e32Npor0CY8EjsChbw91c/nZpotgYA68npJnPAhcZy9VrJjesgZoqXdD1ZIFFLrlm8853ksoshzDmcnpMTTsiF0ImgZWAWUT+uER23UhMiUmXw3qhL4og94jEWbcQEsHgfZ4HqXlDVSWuECii4i0k5tNnspN1CquMxMBrfZzPERzFoaKEWR1CmrKZvrJcbg+rqBfb+LKOAiTNIlqugoT2UWiKvioVxOdc+dlw0sqazYC43M67TDyGMTvA9FD8Q3g3jWat5qQrwj+tSehqnkLsspXF3tIprjfnErnWOLzujh/Svg9rc60SNuZ4i9QedKOS2/8k4p9atexXm+yvrq268IxViPmYPsIW0huSn/axp+yfgTOdhMCSlS4CJG6cdB3Z6yQByBUWK9wc7v7H06GZODkacPonDIzWZcgtQc8AbxUOnYhi/8zVT1MXauwxnhIJms6wcn+4co8ZHRfpsuVqr3yrXuTx5XS8xhFI4UbhBA8+lM6g7bxdKnZzOxwC7Ct27BdO0xsFZOF2jAxilXUFmFUWwet7U+Am+oNWuuJ5HjlSwwldgApc97/6mQSgLBvlgoMFt3n8OatYFzKZZ2sgIXOZQkeynpqmdqqh/bq7tZ8pLZzuow82VjH9KWHwrSw/790o2Sz76w2boKAT6BPk0AgrruY57TDmHoZFU0uMuHG18AM5XqdXC/KGU6txoCOML2AehRch8QMFCA0x4xL7nFrpgH9fULA92Q1CKOqcOzpJpCyoLl0K6WN/qFixK+W2+z5EMVeBw61VXCVYV3Bw2Yx2LB90j7d8y7CIHjb+9jLT4nNTWHvhm7R0LCXzAT/nrbFo6/D0RufgF0TJlZeMdk+3JAeWAnlyURjtw+31cJnGbS+Pru+PFvHpePnc2N9MvxI9xo6Z8evQz/k51nM60vOPwi48NaabVMpgTgxl+F8eNgcBpSNjwuI4hFQEoJxsqXheAus+/GKt7bi/6pGMAOQzi38rlH6zFv2NF2I/0G6lv3op7haOHuASnjxd5k6yNMI81mfZbI5lDX7hI/2N/VDA0Jq+d8Jmsy/1XRAjllGRNff4wQ0/xLUpjg+3/cvrUUPcToVsr0yDKnIk7Af77+qE1eRFM22fmmvoMWjvDfLAWseFIbf6uyuIuk2nOt48rDtyYK4JXcXkO3i2LcJI9xMrY97qUjRFDwz70d/uTcsqAHUgc4h9rBGB6iAFlxn07k75O1ocAr+a2nZZG/mOtP8Z58lu2ShCA//Hd7oeRtXHW1u3ZR3v4BC1EGMxFKJSw+MbWYXCgCTWG8nrAd7SkajF8xni9mPMFausdyrPjQq1AbdbH8GpdipdTYvJTBkWpzphMyn6wji4IRUtHJNc7DHe7kCTcS/IvI95mIpjyF2TLj/SBkxDemTQQ+wm7qFT6RgA0nUzBSoaxjQBEC3sITVou4bm6YzTGHSKiiLnL82io7KS9a5OPb2LG/QbVjWGq1Ar+Fp1PRzpbVbg7g/whUHu2U+/V7nJAOmIXn60t2Tc1DCBi658RdrdBdWkkMDAHpP91BpXtcVHTnLcAOMgLnTho5zWCaoAjMEQlNOdJGfwgO295N9NnbaWsxhErFmiyIiWHzkva0gZHxVHMavt5lFxj451GkAfZcwpSicAsX39itjNy9ly3VeoUqZRKeGrgotc6gbhdYNAht8vzRE4fiPL7QNCv2B3DlMdc9EhSc7T9pRDn44pk86uvztxZdCHZu8QaXSE++TIgQtz2YFWK03iqPsdixjHQsIdQsyJIV8BZNdZimVcx6qVfFJw4flPK8Z74vCQ+WaL2i/0oX80hUoUQRJDTfm5hEOg5SvDjcYVsgCqVcCBrtb0Jmk9Ei/Zgw3ky8iOPzM4S3LMtHdkDWhxM2UR5EvQ8aYlb43XUnlKkn1jPZ+7OOLzDupNQ+pWYMQaWkmkUcP6qx/h8MZWwmsPvf06K6SJRKsXnli1AKlzkRVks9GZv/54KPBVN/R1hpPp8BWs2DhZryluXPOF/JHyu3hiBPWvkIdN5nSiROz7udtdJ+OhbtDNby+PaXPAR5P1U+t3KaC9rCInYBpdkHHbjrK68Hh/JAaBVBjdIVNBuIBtqj/WvLiJbJNL8kJs+RVwl3islnuuAUbpzhyKUyTUe1UbqpHCqiwVNXJZnbxUGxe/EpkKpT1X84A/bhMT5gsKB2sw0NTq+515l4RlUhY9OFi5Aqhrc9bHY8CwiMIrxQMEj5Zh95sceMdNmfENXnQqD9vbEAoTVNeAQuQEfIeauSaeXawDAwwpXK9tUQeJzMFMpFdOX+pgBui+V7bpE4Xqfu+Vw3kzGWhyOzZuJ24pwmnyw4zWCcuakdZ4rz+xrBGnHRShoY2YBePsrbuD9+5sh5Zf57CoZJOskD5JNfWD3V1ZPq2Vx4caNDTkbD4h/MLOhZ2ENP4z/2VGx4lHsWdNKFM9oh2KVQbU+hEnj8Y0vj+7OsauHSPjx+b8WuCu9Ycf1uVz2iR+8VlV2/dzrdaNUR+Xbgw0w2hymTALmBXr9cO/ONdUUvJQ30nzGmS+9abhRsRj25OxZu6CWl8lZjJbRYSpx7fsXWeN21ztUO/VPaSbkfSnwkrsGoXOs485IPTMuvWhwmmHNNPQksxzgI3wuCPD9btsQA0z5ppUz3DraPaEF36GCiwieHwHBVb4sXhimbKNDoea7WB2QQdhrgvPu6HbfybwQ7L22R1etcR2ZVW7wpne4vxs0wxN9l6nrJT/xA10FOSBf2+/XGTIqFaR1PYxl+nzt4yd8a2p9fQCqcNyyKBjSSNRgrt3L2wGjjsevUmmeWzj46VrXklvWt5geDLgIKbLd1JNHtD+p50pRcfCRi1kBoRKfDwBwduo0iC6mJ28nWhBsQqf7MDhpflPc6kECYR4g4lWsXi4uuRaMxZs6Y2Q1UdC6R9IjGkbDjxngihEj6Cc0JnMSjC+ofNvxh7zNkShnt0IJn2hmGJrO7d3D/OBqIISw6xauMc17rM4lAsju+4wgYnTbAuiIlaaQVVWT3X8wJrofzWBISP+LYYgVV+lF9tw0Pry0QHE5kFdzfVogkcH/ITqfNybV1zygI53VPmWLQT3pYf/JyzdnYRgpJpF270MwfXfUtxWxfpWyr5r6JHpIyrKFxB8vldwhHrEtxE+Unu8X+46cFAbrR9o4g34ulQGTJlKbeh59+Zl7yiwwmjZyMmoe3QjhzU56vmJxN3L9Uo6+VUsypO28JoCfh0UTLT6vGjo0eOdTnnHTnIQ62gin0oRHFsytXu0Ev+vPTOhU0BZxNKA9YG0ZRHSMwnPiU9xKMfDWU/afREhHrhsUFl3FVWVf47g8ky4r8M9g2zhJOW1yEgadwzkX3FNrNsvtEw2D4e1CWzPoZ2VPfnxpbnfO7KsgzjEE2Gs8Xm55fvoDQCEI3luaSy1GFP2UbD25VbGqE1F8xAvX7VTQrRr8ZXIe2m1G5tl5IXUhaJ58BNaKVuUmh6UzXMsf1o60jHLrqFhcOE1LqZR5rp46JobqiR4seXlYf1DkSO+T9WCUUlObBiUB7L2CpWXLS3fJww5oyLDUBKOAgDlar6D2jlF3nJhEz06DbzjA792SKp2S7t1tq4fThP1p/QTA1h8vtwH7IWa8PmnrRgKlrCke8er5fEwLkwVl9V7+dDrL1Xe10=