# "Blue Bridge Cup" sixth national game C language Group B 2. Perfect Square (DFS)

Source: Internet
Author: User

If some sides have different squares, you can just spell a larger square, which is called the perfect square.

Historically, it took a long time to find a few perfect squares. For example: 22 squares with a length below
2 3 4 6 7 8 12 13 14 15 16 17 18 21 22 23 24 26 27 28 50 60
The combination of "figure 1.png" is a solution. At this time
Top Edge: 60 50
The bottom edge is: 26 28 17 21 18

The 22-step perfect Square is a total of 8. The following combination is another:
2 5 9 11 16 17 19 21 22 24 26 30 31 33 35 36 41 46 47 50 52 61
If you tell you that the scheme is close to the upper edge, it is from left to right: 47 46 61,
Can you figure out which squares are close to the bottom edge?

Please submit the side length of the square that clings to the lower edge, from left to right, separated by a space.

Do not fill in any superfluous content or explanatory text.

Search for a square edge length that finds a workable solution and outputs the last line

Read someone else's blog to know how to write

`1#include <cstdio>2#include <cmath>3#include <iostream>4#include <cstring>5#include <algorithm>6 using namespacestd;7 intn,vis[ -];8 intD[] = {2,5,9, One, -, -, +, +, A, -, -, -, to, -, *, \$, A, -, the, \$, -, A};9 intg;Ten  One //determine if a square with an edge length of n can be placed A BOOLInsideintXintYintN) - { -     if(! (X+n <=155&& Y+n <=155)) the         return false; -      for(inti = X;i < n+x;i++) -          for(intj = Y;j < n+y;j++) -             if(G[i][j]) +                 return false; -     return true; + } A  at //put a square with a side length of n or take the square - //m==0 take away m==n place - voidFill (intXintYintNintm) - { -      for(inti = X;i < n+x;i++) -          for(intj = Y;j < n+y;j++) inG[I][J] =m; - } to  + //find coordinates that can be placed - voidGet (int&x,int&y) the { *      for(inti =1; I <=154; i++) \$          for(intj =1; J <=154; j + +)Panax Notoginseng             if(!G[i][j]) -             { thex =i; +y =J; A                 return ; the             } + } -  \$ //Check if the large square is full \$ BOOLsolved () - { -      for(inti =1; I <=154; i++) the          for(intj =1; J <=154; j + +) -             if(!G[i][j])Wuyi                 return false; the     return true; - } Wu  - BOOLDfsintXinty) About { \$     if(Solved ()) -         return true; -     Else -     { A Get (x, y); +          for(intK =0; k < +; k++) the         { -             if(Inside (x,y,d[k])) \$             { the                 if(!Vis[k]) the                 { the Fill (X,y,d[k],d[k]); theVIS[K] =1; -                     if(Dfs (x,y+D[k])) in                         return true; theFill (X,y,d[k],0); theVIS[K] =0; About                 } the             } the             Else the                  Break; +         } -     } the     return false;Bayi } the  the intMain () - {     -     //int a; thememset (Vis,0,sizeof(Vis)); thememset (G,0,sizeof(G)); theFill (1,1, -, -); theFill (1, -, \$, \$); -Fill (1,94, A, A); theSort (d,d+ +); theDfs1,1); the 94      for(inti =1; I <=154; i++) thecout << g[i] <<' '; the  the     return 0;98}`

"Blue Bridge Cup" sixth national game C language Group B 2. Perfect Square (DFS)

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