第16章 四方和（1 / 1）

PmMvPA2BvO+rv+WJhOaEmueIueSapOWJnOaxsOWcveSIkOWEmueWu+SOuOSMvO+mi+ibl+eIueSapOWJnOa5r+WcveS6uuSGleWMkuWMvO+Ureeem+WGhOiyueW2l+aMkOW6uuSMuuSdgOK9peWcgOKdgOKCgOOGiOWzueW6uuSbm+W3jui2lOaMvO+LieaEsOW1gee+sueOo+mAnea0m+WcgOKavO+Tgemljua0m+eMvO+dr+ifuuWNuOS2ueW6uuSGleWdgOKfvO+XkOW6uuSMuuSRiOa+oemnheeBpuiMvO+WjeWwueS9peWIueSAu+SJnOavmOafvOWBgOi6uuSGleWcgOKavO+TgemUreeem+WMvO+RrOeAuOS/mOW/mOWZueSPsOWxkumdgOKfvO+nkOWapOWNuOSYv+i3jui2lOaEmueNveSMuuScgOKavO+3teiNk+WtuOSRhOiEmue6uuSMuuSonOW2l+aMkOWzn+mgvOStr+iDv+WEmue6uuSGleWCgOOoiuWMoei0pOWGiOWHpOWGh+WEmueRpeWYu+mJnOaIvuWMvO+8nOeAuOSbnOaSuuSqgOaBgOiquOSkuOSCgOONvOSfmOm8gueVr+iem+WNh+mBpuiYv+iMvO+/ieagvOSTgemnpOWwiOWXvuWBpuiFu+SNuOSMvO+0qeeTouWZvumepeelheWbv+iWu+ShrOaZv+iMvO+ruuiGiOWAoeiEmueMleeDouWMkOWquOSkuOSLuOSZveSYv+iMvO+fnOadiOW6n+WRreevmOaWu+SEmueonOWwjueMvO+dgOaDv+W5gueGuuS5tOiZueSPsOWxkuk+Yzw+Yy88DYKA44iE5oqX54u55I+a6Z+55L+K5aS85Iy875+c5rqf5ZGt57CI5Z6b5bCW5o2H6bq45K6/5Iy877CN5YGw5ZOB6Zub5ays54a65IC85aOn6J+A6YW/6Im45IGA6Jmt5YKA46q45KuF5amJ5Zi/6Iy876665IK85oSa57K55YKA47e16I2T5Yaw5bON5bCj5ZC55Iy877yk56yR6ISa54Kt6ZSt6aSP5Yy876ic5Zi/6LOf6Zm95ISa55q85J6I6LyC5r2/6IKt6byL55uv5pGH6Yy874iT5YiT5T5jPD5jLzwNgoDjlqTlk73kuoflm4rmt7XogLjkgq3plK3ppI/lio/liYLogKHohJrnlozljJDlq6Loiormprrln4DphJrnq7/lgJzmpbvkjLzvi7jkiJDljYXphJrngq3pia3no6Hogq3pqJzlvYPojYnmmb/ojLzvh6TlhoflmqTliL7lhrrkmoHlhJrnmLvpmLvpn7nklrvklLjkjIDojLzvhJrnlrvkr5jmk73kq7ron6vnla/mjLzvhJrnk4HppZ/nr5jmlrvkjLzvu47lvJznpZ3miZznmbnkj7DlsZLpjJLlgq3plK3ppI/lgoDjtIXlmKvpm7rkiZzmmL/ojLzvlLDmn5TniLnkjoDmobLmlrvkoazmmb/ohr3kjLzvhrrkoa7ol67nq6LoiI/libjkgYDoma3lPmM8PmMvPA2CgOOeruWdh+WQuOaQgOmxveWruuiEmueZueSPsOWxkumMvO+JguiAoeiMkuWEremCremtpeeujOeCremUremkj+WAneePmumCgOO1mOmnpOWJguiAoeinuuWAuOSGuuS6h+WGkeatuOS6qeeonOWzjeWLq+eMvO+TveSruuiJuOSBgOiZreWAvOW7pueJguiAoeiEmue9peWWjOWMkOWAneemuOWWu+SMvO+XiuaNj+WJnOahsua2ueWCremUremkj+WCgOO7juW6h+WGuuSQkOW3teiAuOSCremUremkj+WAnee5o+iJguiAoeiEmueWjOWMkOWrouiMvO+LuOSAuOSEmuedgOKHk+WcgOK0mOWnpOWAvOWgvOWMvO+gi+efpOWJuOSBgOiZreWCgOOtpeeujOe2l+aMkOWJguiAoeiJuOSBgOiZreWEmueWjOWMkOWwjeWUremAoeiMvO+Dv+WtuOS6uOSxt+Wqh+ilu+SMvO+Emuersei5iueNuOSrr+aMvO+Yj+WJnOaFg+aLuuSBp+iCremUremkj+WMvO+6nOWRleafgOmrgeeCremXvOSGm+mbi+aMvO+dgOKwjeWUremAoeicgOKvmOaMvO+GuuSfhue8nOeqpOWWu+S/peicuOSZv+iMvO+5r+WNuOSAneeLnOejoeiCremMvO+WjOWYj+WfgOmFv+iLp+WAvOWMvO+FhuWTveSJuOSBgOiZreWlheWSgOW/peicuOSCgOOntOiBp+eGuuSmuOWfueSCremUremkj+WMvO+3oOaAuOSCrem1mOmMkOWCpuWMvO+Emuext+Wqh+iJuOSBgOiZreWvmOaNuOS2hOeTveW/peicuOS2k+eZv+iCgOOMh+m0mOWGuuSbv+iSgOWEmuersei5iueNuOSrr+a/peicuOSEmueinemMh+mKiuaOkOWAvOWTieaMvO+2k+eJjuequOSAuOSlnea6h+WWj+WtuOSOvOmzsuWDjeWOu+SJuOSBgOiZreWBp+iqj+WCgOOtj+e8gOWCremUremkj+WwiOWuveippOWKu+SMvO+tuOS3teaGr+iEmueJuOSBgOiZreU+Yzw+Yy88DYKA44C85YaI5aqH6ISQ5Y2J5rmC57Cc5aKd6YGn6I2G5b2l5aa654y876u/5YmE5oi+5YSa54Sk5bib57q65Iy65IyS5aW75ICJ5oy876K06J+U55Sw5oyS5ZGQ5YC45Lq65IaV5YKA47q65IaV5bu75KG/5IyS5ZG/6LK65I+E5r+E5rml5Yy877CO57qH5YSa57+95Kmk5Y6Y5o676bq45KCb5Yy876+P5aSu6ISa57ml5Ya65LCI5Ze+5bq65IaV5YSa56mk5Yq75Iy877q65Kq45IC45K+P5aSu6JGw5Yi+5bml5Yy874Sa56yL56St5a+Y5p+55Iy874Sa57KC5Zir6a+Y5rOl5aOc5YKA47q65IaV5ZyL5oe05YSa54O/5YWG5aqH6JGP5Za75Iy8746Y5p6l56WL6KyV5pa75Kmu6L2D6Z2v6ISa57Sv6Iu65ISa55qB5bq65IaV5Yy876mk5Yq75Iy877q65ISa55GQ5YWG5YyA6JWN5aSt5aq45K+Y5oKt6ZGJ5T5jPD5jLzwNnYDigoDjuZbmsJzlhJrnh7/ol5bmmIjmj7vnvpvmlK3pkYnllIDilIDir5jmhJrnqYvmiYDpuaXljLzvkYjmr5jmjbjkhJrnqYvmiYDpuaXlnIDimrzvtK/ogq3pkYnlua/lo4/lj5rpv77kjLzvna/okaznqrjkgLjkhJrnirjkg5DnsJzlhrrkt7Xos4PmlrvkjLzvkaznvaXlm7rkiZzmjpDli7nkhrrkrJDlurrkhpXlnYDin7zvoL3kqYvmiYDpmrzkiLnkgLvkurjkuaXlnIDimrzvk4HprpfphJrno6fojbjkhojlgY3ljLzvuITogYDohJrnurrkhpXli5znhrrki5znlrvkjLzvkYPmt7/ojJLlvZDosaTlhJrng7/lobvmgq3pkYnlgoDju47lm7/ohrrku5LpqIrlqofotKXlj7DljLzvsJTnubjkhrrkgLzlvpTmjLzvj4TmjJXmsIjliafon4TmiZzmobLmurrkhpXljLzvjYnlop3phJrnurrkhpXlhrrkqJzlsI7nuofljLzvhrrksaTliLbmirjki4nmhJrngq3pkYnljrvkjLzvu7jkrIXlk73lj4Tmv4TmjbjktKXlj7DlnYDigoDjkq/miZzmr5jmmq7lr4LokYnlo4/lmb/onIDimrzvs4Pmg7/ljLzvv4TlvJznvZnnu7/ntJvnl77lrJDlurrkhpXlnYDigoDju6bnhojljbjkuLDmrLvkkYjmjLzvoL3kpIrmtZHlvaXlvaXln5TngLjkhJrnkYjmqJTngabokYjmjLzvu7jkrIXlhJrnkYjmr5jmsbDloL3kgoDju7jkrIXlq4/ljLzvhrrktKXlj7Dlq4/lgabojbjksbDloL3kjpDlpbvkn7zvvaXljbjkvaXlkYjmgJ3nn7fojLzvoL3koqzmnJblkYjmnIDimrzvk4HptK/ohJrnmq/olJnouITogLjkjLzvtKXlj7DlgJ3np43mi4nmjI/lgq3pkYnljLzvhJ/mkYnlhJrnuaXlhrrkj73kk4rmi4nmqo/lgLjkgoDju6bnnqPpgabosbDljLzvt7XomKPpjKHoqofojLzvo7jpu73ohJrnrIjor4HmuY/luoflkY/ltKXlj7DljLzvnYDpiLbmgq3pnqXnhJrnlK3pkYnlPmM8PmMvPA2CgOO7juWMgOi0pOWQuuaAneeQgOm9v+iMvO+6qeeameilheWBgemlu+SAieaMvO+Mh+mZv+ionOWNuOS2ueW0pOWQuuaEmueJheWGuuSwiOWGr+iPhOaOueS8vOS/veSppOWPsOWMvO+7juWLuOSht+aXmuaVmeaJheWEmueKuOSTveSruui6uuSGleWCgOOIhOaKl+e0l+msnue/iuWkvOSMvO+tuOSTveWzmOmWmuall+almOaonOWyguiVreWbveS/u+SMvO+Crem1geeBgOOTveSruuiEmue5peWCgOOTveSruuilheWNnuibiuWVs+aOmOaJheWEmueAh+WvuueMvO+EmueHv+iJnOaqnOaOu+ShguiAuOSwiOWJp+ifhOazpeWjnOWMvO+KuOSruuizpeWjnOWonOW9kOienOmdnOaVvOeAuOS6h+WljOaLieasiuaMvO+2l+azpeWjnOWEmuekvOSNh+mnvuSruui6uuSGleWwiOWLnOeCgOOKuOSAhuipguiWu+SonOW9kOiMvO+InOWAuOSGuuSsvei6uuSGleWVu+e0m+WMvO+6h+Weo+mtuOS6qeeameiOu+S/veSppOWPsOWEmueOmOaPgOmqj+WAuOSCgOOVmeaJheWRh+mkteiGuuS6h+WRj+W/hOWInOWAuOSTveSruuiWu+SMvO+ZgOW2l+aEmueagOmepeeolOe/veSMvO+DouWTgemOmOaOu+mfi+ahqOatuOS3teaGr+ionOW6uuSGleU+Yzw+Yy88DYKA442e6Ii25p+A6YW/6K245ImF5bOY6YSa57KJ6JGH6aic5Yy8776b6aiZ5oSa54SW6ISW6LaX5o6Y5o676YyQ5YKm5YKt6Z6l54Sa55St6ZGJ5Yy877e16IeN5YmG5YmG5bOY6Z2c5oSa56K656uB56696IC45Iy876245Le15oav6ISa57q65IaV5aic5YKA44iQ5Y2e6Iun5YC85YKt6Z6l54GA44mE6ICh6IGA45uK5ZWz5oy876+Z5oWD5oSa54ic5oGy5ZeK5rmv5baX5pO95YCd57OD5p6b5bq65IaV5YKA45+85Z+85Y+w5aq45K+Y5rGw5Yy875Sv5ouA44ic5oGy5YqA44yS5YKt6Z6l54Sa55St6ZGJ5Yy877uI5YC45KOC6YSa54uA44ic5oGy5YqA46On6LSg54a65LCI5Z6b5Zu95L+75Iy874mC5p+G57CI5Z+E5rq65IaV5amu6JW55YC45Jm/6D5jPD5jLzwNgoDjpZ3mkYnmlrvkkZDli7jkjIDoirjkqofojLzvvYXlm4znhJrnp6TlqLfltKTlgLjkj4Plgq3pnqXnlK3pkYnljLzvrbjkpZ/nn4TmhJrnurrkhpXlgoDjg7/liZznurrkhpXlpYXluojljLzvk73kq7rolK3pkYnluoflnqPpiYXlkbvpuYrmgLjkPmM8