{"id":266,"date":"2012-11-15T10:51:00","date_gmt":"2012-11-15T02:51:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/171"},"modified":"2012-11-15T10:51:00","modified_gmt":"2012-11-15T02:51:00","slug":"poj_2185_tiled_matrix","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=266","title":{"rendered":"POJ 2185(\u6700\u5927\u5e73\u94fa\u77e9\u9635\uff09"},"content":{"rendered":"\n\n\n
\n
Language:\n\n\n\n
Time Limit:<\/strong> 3000MS<\/td>\n <\/td>\nMemory Limit:<\/strong> 65536K<\/td>\n<\/tr>\n
Total Submissions:<\/strong> 4346<\/td>\n <\/td>\nAccepted:<\/strong> 1780<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Description<\/p>\n

\n\u7ed9\u5b9aR(1 <= R <= 10,000) <\/span>*C (1 <= C <= 75) <\/span>\u7684\u77e9\u9635\uff0c\u6c42\u5b83\u7684\u6700\u5927\u5e73\u94fa\u77e9\u9635,\u4e0d\u591f\u7684\u5730\u65b9\u53ef\u90e8\u5206\u5e73\u94fa\uff0c\u4f46\u4e0d\u53ef\u91cd\u53e0\u3002<\/div>\n

Input<\/p>\n

\n\u7b2c\u4e00\u884c\uff1aR\u548cC.<\/div>\n
\n\u7b2c2-R+1\u884c\u6bcf\u884cC\u4e2a\u5927\u5199\u5b57\u6bcd\uff0c\u8868\u793a\u77e9\u9635.<\/div>\n

Output<\/p>\n

\n\u6700\u5927\u7684\u5e73\u94fa\u77e9\u9635\u9762\u79ef\n<\/div>\n

Sample Input<\/p>\n

2 5\nABABA\nABABA\n<\/pre>\n
Sample Output<\/p>\n
2\n<\/pre>\n
Hint<\/p>\n
\nThe entire milking grid can be constructed from repetitions of the pattern 'AB'.<\/div>\n
Source<\/p>\n
\nUSACO 2003 Fall<\/a><\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u663e\u7136\u8fd9\u4e2a\u77e9\u9635\u5fc5\u7136\u4ece\u5de6\u4e0a\u89d2\u5f00\u59cb<\/span><\/p>\n
\u7531\u4e8eC\u6bd4\u8f83\u5c11\uff0c\u5148\u627e\u51fa\u6bcf\u5217\u6700\u5927\u7684\u5e73\u94fa\u7ebf\u6bb5\uff08\u884c\u884c\u4e0d\u5f71\u54cd\uff09<\/span><\/p>\n
\u518d\u8003\u8651\u6bcf\u884c\u5171\u6709\u4e14\u6700\u5c0f\u7684\u91cd\u590d\u90e8\u5206\uff08\u53ef\u4ee5\u8bc1\u660e\u589e\u52a0\u91cd\u590d\u90e8\u5206\u5bf9\u884c\u7684\u5927\u5c0f\u65e0\u5f71\u54cd\uff09<\/span><\/p>\n
\u5728\u8003\u8651\u884cR\u226410000\uff0c\u5fc5\u987b\u7528Kmp\uff0c\u4e0d\u51e1\u5047\u8bbe\u53e5\u672b\u6709\u82e5\u5e72'????'<\/span><\/p>\n
\u5219\u5bf9\u4e8e\u5b57\u7b26\u4e32\u7684P<\/span><\/p>\n
AEICCCAEICCCAEI C  C  ?   ?   ?  ...<\/span><\/p>\n
000000123456789 10 11 12  13  14 ...<\/span><\/p>\n
\u663e\u7136\uff1f\u540e\u7684P\u9012\u589e+1\uff0c\u53c8\u56e0\u7b54\u6848\u4e3aMax\uff08i-p[i])\uff08i\u2265n\uff09<\/span><\/p>\n
\u6240\u4ee5(n-p[n])=Max\uff08i-p[i])<\/span><\/span><\/p>\n

\n<\/span><\/span><\/p>\n
<\/span><\/span><\/p>\n
Program grid;\nconst\n   maxn=10000;\n   maxm=75;\nvar\n   n,m,i,j,k:longint;\n   a:array[1..maxn] of string;\n   f:array[1..maxm] of longint;\n   flag:boolean;\n   p:array[1..maxn] of longint;\nbegin\n   fillchar(f,sizeof(f),0);\n   readln(n,m);\n   for i:=1 to n do\n   begin\n      readln(a[i]);\n      for j:=1 to m do\n      begin\n         flag:=true;\n         for k:=j+1 to m do\n            if a[i][k]<>a[i][k-j] then begin flag:=false; break; end;\n            if flag then inc(f[j]);\n      end;\n   end;\n   for i:=1 to m do if f[i]=n then break;\n   m:=i;\n\n   for i:=1 to n do delete(a[i],m+1,maxlongint);\n\n   j:=0;p[1]:=0;\n   for i:=2 to n do\n   begin\n      while (j>0) and (a[i]<>a[j+1]) do j:=p[j];\n      if (a[i]=a[j+1]) then inc(j);\n      p[i]:=j;\n   end;\n\n   n:=n-p[n];\n   writeln(m*n);\n\n\n\n\n\nend.\n<\/pre>\n<\/p>\n

\n<\/span><\/span><\/p>\n

\n<\/span><\/p>\n

\n<\/span><\/p>\n

\n<\/span><\/p>\n

\n<\/span><\/p>\n

\n<\/span><\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
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