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  • bzoj1296 [SCOI2009]粉刷匠

    题目链接

    背包

    两层背包(分组背包)

    一个处理一块板子内的情况

    一个处理整体的情况

     1 #include<algorithm>
     2 #include<iostream>
     3 #include<cstdlib>
     4 #include<cstring>
     5 #include<cstdio>
     6 #include<string>
     7 #include<cmath>
     8 #include<ctime>
     9 #include<queue>
    10 #include<stack>
    11 #include<map>
    12 #include<set>
    13 #define rre(i,r,l) for(int i=(r);i>=(l);i--)
    14 #define re(i,l,r) for(int i=(l);i<=(r);i++)
    15 #define Clear(a,b) memset(a,b,sizeof(a))
    16 #define douin(x) scanf("%lf",&x)
    17 #define strin(x) scanf("%s",(x))
    18 #define LLin(x) scanf("%lld",&x)
    19 #define inin(x) scanf("%d",&x)
    20 #define CSC main
    21 typedef unsigned long long ULL;
    22 typedef const int cint;
    23 typedef long long LL;
    24 using namespace std;
    25 int yp()
    26 {
    27     int x=0,f=0;char ch=getchar();
    28     while(ch<'0'||ch>'9'){if(ch=='-')f=1;ch=getchar();}
    29     while(ch>='0'&&ch<='9')x*=10,x+=ch-'0',ch=getchar();
    30     return f?-x:x;
    31 }
    32 int n,m,t,ans,a[55],h[55][55],hh[55][2525];
    33 char s[55];
    34 int CSC()
    35 {
    36     n=yp(),m=yp(),t=yp();
    37     re(i,1,n)
    38     {
    39         strin(s+1);
    40         re(j,1,m)a[j]=s[j]-'0'+a[j-1];
    41         re(j,1,m)re(k,1,m)
    42         {
    43             h[k][j]=0;
    44             re(l,0,k-1)
    45             {
    46                 int temp=a[k]-a[l];
    47                 h[k][j]=max(h[k][j],h[l][j-1]+max(temp,k-l-temp));
    48             }
    49         }
    50         re(j,1,t)re(k,1,min(m,j))
    51             hh[i][j]=max(hh[i][j],hh[i-1][j-k]+h[m][k]);
    52     }
    53     re(i,1,t)ans=max(ans,hh[n][i]);
    54     printf("%d
    ",ans);
    55     return 0;
    56 }
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  • 原文地址:https://www.cnblogs.com/HugeGun/p/5151427.html
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