{"id":300,"date":"2012-12-14T17:00:00","date_gmt":"2012-12-14T09:00:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/205"},"modified":"2012-12-14T17:00:00","modified_gmt":"2012-12-14T09:00:00","slug":"cf_253d_matrix_-4_angle_equal_matrix_weight_upper_limit_of_the_number_of_matrix","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=300","title":{"rendered":"CF 253D(\u77e9\u9635-4\u89d2\u76f8\u7b49\u4e14\u77e9\u9635\u6743\u503c\u6709\u4e0a\u9650\u7684\u77e9\u9635\u6570\uff09"},"content":{"rendered":"
\n
\n
\n
\n
\n
D. 4a\u77e9\u9635<\/div>\n
\n
\ntime limit per test<\/div>\n

2 seconds<\/p><\/div>\n

\n
\nmemory limit per test<\/div>\n

256 megabytes<\/p><\/div>\n

\n
\ninput<\/div>\n

input.txt<\/p><\/div>\n

\n
\noutput<\/div>\n

output.txt<\/p><\/div>\n<\/div>\n

\n

\n\u6709\u4e00\u4e2a <\/span>n<\/em>\u2009\u00d7\u2009m<\/em><\/span> \u7684\u77e9\u9635, \u884c 1 \u5230 <\/span>n<\/em><\/span>,
\n \u52171 to <\/span>m<\/em><\/span>.<\/span><\/p>\n

\n4a\u77e9\u9635\u5b9a\u4e49:<\/p>\n

\n

    \n
  • \n\u77e9\u9635\u5185\u6700\u591a\u6709 k<\/em><\/span> \u4e2a "a<\/span>" ;<\/li>\n
  • \n4\u4e2a\u89d2\u76f8\u7b49\uff0c\u957f\u5bbd\u5927\u4e8e1.<\/li>\n<\/ul>\n

    \n

    \n\u8bf7\u5728\u7ed9\u5b9a\u77e9\u9635\u4e2d\u6570\u51fa\u6709\u51e0\u4e2a\u5b50\u77e9\u9635\u662f4a\u77e9\u9635.<\/p>\n

    \nInput<\/span><\/p>\n<\/div>\n

    \n

    \n\u7b2c\u4e00\u884c3\u4e2a\u6574\u6570n<\/em>,\u2009m<\/em>,\u2009k<\/em><\/span> (2\u2009\u2264\u2009n<\/em>,\u2009m<\/em>\u2009\u2264\u2009400; 0\u2009\u2264\u2009k<\/em>\u2009\u2264\u2009n<\/em>\u00b7m<\/em>)<\/span>.<\/p>\n

    \n\u63a5\u4e0b\u6765\u4e3a\u77e9\u9635.<\/p>\n<\/div>\n

    \n
    \nOutput<\/div>\n

    \n\u4e00\u4e2a\u6574\u6570\uff0c\u8868\u793a4a\u77e9\u9635\u6570.<\/p>\n<\/div>\n

    \n
    \nSample test(s)<\/div>\n
    \n
    \n
    \ninput<\/div>\n
    3 4 4\naabb\nbaab\nbaab\n<\/pre>\n<\/div>\n
    \n
    \noutput<\/div>\n
    2\n<\/pre>\n<\/div>\n
    \n
    \ninput<\/div>\n
    4 5 1\nababa\nccaca\nccacb\ncbabc\n<\/pre>\n<\/div>\n
    \n
    \noutput<\/div>\n
    1\n<\/pre>\n<\/div>\n<\/div>\n<\/div>\n
    \n
    \nNote<\/div>\n
    \n\u7b2c\u4e00\u4e2a\u6837\u4f8b\u7684\u89e3 (2,\u20092)<\/span> (3,\u20093)<\/span>,
    \n
    \n(2,\u20091) <\/span>(3,\u20094)<\/span>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
    \u8fd9\u9898\u662f\u72b6\u6001\u538b\u7f29\u95ee\u9898\u3002<\/span><\/p>\n
    \u7528s[i][j]=\u2211a[1][j]+a[2][j]+..+a[i][j]<\/span><\/p>\n
    \u90a3\u4e48\u6211\u4eec\u53ea\u9700\u8981\u679a\u4e3e3\u4e2a\u91cf<\/span><\/p>\n
    \u884c\u7684\u4e0a\u4e0b\uff0c\u8fd8\u6709\u5217\u7684<\/span><\/p>\n
    \u663e\u7136r<\/span>\u5217\u7684\u5173\u7cfb\u53ef\u4ee5\u7531r-1\u7684\u5173\u7cfb\u63a8\u51fa\u3002<\/span><\/p>\n

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

    \n<\/span><\/p>\n
    <\/span><\/p>\n
    #include<cstdio>\n#include<cstring>\n#include<cmath>\n#include<iostream>\n#include<cstdlib>\nusing namespace std;\n#define MAXN (400+10)\n#define MAXM (400+10)\nint n,m,k;\nchar a[MAXN][MAXM];\nint s[MAXN][MAXM];  \/\/\u8868\u793as[i][j]=a[1][j]+a[2][j]+..a[i][j]\nint c[1<<8];\nint main()\n{\n\tfreopen("input.txt","r",stdin);\n\tfreopen("output.txt","w",stdout);\n\n\n\tmemset(s,0,sizeof(s));\n\tscanf("%d%d%dn",&n,&m,&k);\n\tfor (int i=1;i<=n;i++)\n\t{\n\t\tgets(a[i]+1);\n\t\tfor (int j=1;j<=m;j++)\n\t\t{\n\t\t\ts[i][j]=s[i-1][j]+(a[i][j]=='a');\n\t\t}\n\t}\n\tlong long ans=0;\n\t\/*\n\tfor (int i=1;i<=n;i++)\n\t{\n\t\tfor (int j=1;j<=m;j++)\n\t\t\tcout<<s[i][j]<<' ';\n\t\tcout<<endl;\n\t}\n\t*\/\n\t;\n\tfor (int i=1;i<n;i++)\n\t{\n\t\tfor (int j=i+1;j<=n;j++)\n\t\t{\n\t\t\tint l=1,tot=0;\n\t\t\tmemset(c,0,sizeof(c));\n\t\t\tfor (int r=1;r<=m;r++)\n\t\t\t{\n\t\t\t\ttot+=s[j][r]-s[i-1][r];\n\t\t\t\twhile (tot>k)\n\t\t\t\t{\n\t\t\t\t\ttot-=s[j][l]-s[i-1][l];\n\t\t\t\t\tc[a[i][l]]-=(a[i][l]==a[j][l]);\n\t\t\t\t\tl++;\n\t\t\t\t}\n\t\t\t\tif (l<r&&a[i][r]==a[j][r]) ans+=c[a[i][r]];\n\t\t\t\tif (a[i][r]==a[j][r]) c[a[i][r]]++;\n\t\t\t}\n\t\t}\n\t}\n\tcout<<ans<<endl;\n\treturn 0;\n}<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"
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