2714 - 橱窗布置
假设你想以最美观的方式布置花店的橱窗。现在你有F束不同品种的花束,同时你也有至少同样数量的花瓶被按顺序摆成一行。这些花瓶的位置固定于架子上,并从1至V顺序编号,V是花瓶的数目,从左至右排列,则最左边的是花瓶1,最右边的是花瓶V。花束可以移动,并且每束花用1至F间的整数唯一标识。标识花束的整数决定了花束在花瓶中的顺序,如果I<J,则令花束I必须放在花束J左边的花瓶中。
每一个花瓶都具有各自的特点。因此,当各个花瓶中放入不同的花束时,会产生不同的美学效果,并以美学值(一个整数)来表示,空置花瓶的美学值为零。
在上述例子中,花瓶与花束的不同搭配所具有的美学值,如下表所示。
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">花</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">瓶1</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">瓶2</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">瓶3</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">瓶4</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">瓶5</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">花 1 (杜鹃花)</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">7</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<td valign="top" width="101">
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;background-color:#FFFF00;">23</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">-5</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<td valign="top" width="101">
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">-24</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<td valign="top" width="101">
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">16</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">花 2 (秋海棠)</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">5</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">21</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">-4</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<td valign="top" width="101">
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;background-color:#FFFF00;">10</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<td valign="top" width="101">
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">23</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">花 3 (康乃馨)</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">-21</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<td valign="top" width="101">
<p class="0" style="text-align:justify;">
<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">5</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<td valign="top" width="101">
<p class="0" style="text-align:justify;">
<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">-4</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<td valign="top" width="101">
<p class="0" style="text-align:justify;">
<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">-20</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;background-color:#FFFF00;">20</span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span>
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<span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"> 例如,根据上表,杜鹃花放在花瓶2中,会显得非常好看;但若放在花瓶4中则显得十分难看。</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"><br />
为取得最佳美学效果,你必须在保持花束顺序的前提下,使花束的摆放取得最大的美学值。如果有不止一种的摆放方式具有最大的美学值,则其中任何一直摆放方式都可以接受,但你只要输出任意一种摆放方式。
<span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;"></span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">(2)假设条件</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span>
<span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"></span><span style="font-size:10.5pt;font-family:宋体;line-height:normal !important;">1≤F≤100,其中F为花束的数量,花束编号从1至F。</span><span style="font-size:10.5pt;font-family:'Times New Roman';line-height:normal !important;"><br />
F≤V≤100,其中V是花瓶的数量。
-50≤Aij≤50,其中Aij是花束i在花瓶j中的美学值。
Input
输入文件是正文文件(text file),文件名是flower.inp。
第一行包含两个数:F,V。
随后的F行中,每行包含V个整数,Aij 即为输入文件中第(i+1 )行中的第j个数。
Output
输出文件必须是名为flower.out的正文文件,文件应包含两行:
第一行是程序所产生摆放方式的美学值。
第二行必须用F个数表示摆放方式,即该行的第K个数表示花束K所在的花瓶的编号。
Examples
Input
3 5 7 23 -5 -24 16 5 21 -4 10 23 -21 5 -4 -20 20
Output
53 2 4 5
Solution C++
#include<cstdio> #include<cstring> using namespace std; int a[201][201],b[201][201]; int INF=1000000000; int max(int a,int b) { if(a>b) { return a; } return b; } int Print(int i,int j) { int n; if(i>0) { n=i; while(b[i][n]!=j) { n++; } Print(i-1,j-a[i][n]); printf("%d ",n); } } int main() { int F,V; while(~scanf("%d%d",&F,&V)) { for(int i=1;i<=F;i++) for(int j=1;j<=V;j++) scanf("%d",&a[i][j]); for(int i=1;i<=F;i++) for(int j=0;j<=V;j++) b[i][j] = -INF; for(int i=1;i<=F;i++) { for(int j=i;j<=V;j++) { if(b[i-1][j-1] + a[i][j] <= b[i][j-1]) b[i][j] = b[i][j-1]; else { b[i][j] = b[i-1][j-1] + a[i][j]; } } } printf("%d\n",b[F][V]); Print(F,b[F][V]); puts(""); } return 0; }