usaco-4.4-frameup-passed

这个好像要容易些。

/*
ID: qq104801
LANG: C++
TASK: frameup
QQ:104804687
*/

#include <iostream>
#include <fstream>
#include <cstring>
#include <vector>
#include <queue>
#include <stack>
#include <algorithm>

#define rep(i, n) for(int i = 1; i <= n;i++)

using namespace std;

const int maxn=50;

int w,h,p,l[maxn],r[maxn],u[maxn],d[maxn],D[maxn];
char map[maxn][maxn],_p[maxn];
bool a[maxn],g[maxn][maxn];

void dfs()
{
  bool flag=0;
  for(int i=1;i<=26;i++)
    if(a[i])
    {
      flag=1;
      break;
    }
  if(!flag)
  {
    for(int i=1;i<=p;i++)
      cout<<_p[i];
    cout<<endl;
    return;
  }
  for(int i=1;i<=26;i++)
    if(a[i] && D[i]==0)
    {
      _p[++p]=i+'@';
      for(int j=1;j<=26;j++)
        if(g[i][j])
          D[j]--;
      a[i]=0;
      dfs();
      for(int j=1;j<=26;j++)
        if(g[i][j])
          D[j]++;
      a[i]=1;
      p--;
    }  
}

void test()
{   
    freopen("frameup.in","r",stdin);  
    freopen("frameup.out","w",stdout);  
    cin>>h>>w;
    char c;
    for(int i=1;i<=h;i++)
      for(int j=1;j<=w;j++)
      {
        cin>>c;
        map[i][j]=c;
        if(!l[c-'@'] || j<l[c-'@']) l[c-'@']=j;
        if(!r[c-'@'] || j>r[c-'@']) r[c-'@']=j;
        if(!u[c-'@'] || i<u[c-'@']) u[c-'@']=i;
        if(!d[c-'@'] || i>d[c-'@']) d[c-'@']=i;
        a[c-'@']=1;
        //cout<<map[i][j];
        //if(j==7)cout<<endl;
      }      
    
    memset(g,0,sizeof(g));
    for(int i=1;i<=26;i++)
      if(a[i])
      {
        for(int j=l[i];j<=r[i];j++)
        {
          if(map[u[i]][j]!='.') g[i][map[u[i]][j]-'@']=1;
          if(map[d[i]][j]!='.') g[i][map[d[i]][j]-'@']=1;
        }
        for(int j=u[i];j<=d[i];j++)
        {
          if(map[j][l[i]]!='.') g[i][map[j][l[i]]-'@']=1;
          if(map[j][r[i]]!='.') g[i][map[j][r[i]]-'@']=1;
        }
      }
    for(int i=1;i<=26;i++)
      for(int j=1;j<=26;j++)
        if(i!=j && g[i][j])
          D[j]++;
    p=0;
    dfs();
    return;
}

int main () 
{        
    test();        
    return 0;
}

test data:

USACO Training
Grader Results     
14 users online
CHN/4 IND/4 KGZ/2 MKD/1 NED/1 USA/1 VNM/1

USER: cn tom [qq104801]
TASK: frameup
LANG: C++

Compiling...
Compile: OK

Executing...
   Test 1: TEST OK [0.003 secs, 3380 KB]
   Test 2: TEST OK [0.003 secs, 3380 KB]
   Test 3: TEST OK [0.003 secs, 3380 KB]
   Test 4: TEST OK [0.003 secs, 3380 KB]
   Test 5: TEST OK [0.003 secs, 3380 KB]
   Test 6: TEST OK [0.003 secs, 3380 KB]
   Test 7: TEST OK [0.005 secs, 3380 KB]
   Test 8: TEST OK [0.092 secs, 3380 KB]
   Test 9: TEST OK [0.292 secs, 3380 KB]

All tests OK.

YOUR PROGRAM ('frameup') WORKED FIRST TIME! That's fantastic -- and a rare thing. Please accept these special automated congratulations.

Here are the test data inputs:

------- test 1 ----
9 8
.CCC....
ECBCBB..
DCBCDB..
DCCC.B..
D.B.ABAA
D.BBBB.A
DDDDAD.A
E...AAAA
EEEEEE..
------- test 2 ----
3 3
AAA
A.A
AAA
------- test 3 ----
5 7
AAA.CCC
A.A.C.C
AABBBCC
..B.B..
..BBB..
------- test 4 ----
11 8
UUUUU...
U...U...
U...EEEE
U...E..E
UMMMM..E
UMUUMEEE
.MJJJJJJ
.MJ.M..J
.MJ.M..J
.MJMM..J
..JJJJJJ
------- test 5 ----
6 9
AAABBBCCC
AQAQQQCQC
AAABBBCCC
XQXYYYZQZ
XQQYQYQQZ
XXXYYYZZZ
------- test 6 ----
20 20
AAABCDEFGHIJKLMNOPQR
A.ABCDEFGHIJKLMNOPQR
AAABCDEFGHIJKLMNOPQR
BBBBCDEFGHIJKLMNOPQR
CCCCCDEFGHIJKLMNOPQR
DDDDDDEFGHIJKLMNOPQR
EEEEEEEFGHIJKLMNOPQR
FFFFFFFFGHIJKLMNOPQR
GGGGGGGGGHIJKLMNOPQR
HHHHHHHHHHIJKLMNOPQR
IIIIIIIIIIIJKLMNOPQR
JJJJJJJJJJJJKLMNOPQR
KKKKKKKKKKKKKLMNOPQR
LLLLLLLLLLLLLLMNOPQR
MMMMMMMMMMMMMMMNOPQR
NNNNNNNNNNNNNNNNOPQR
OOOOOOOOOOOOOOOOOPQR
PPPPPPPPPPPPPPPPPPQR
QQQQQQQQQQQQQQQQQQQR
RRRRRRRRRRRRRRRRRRRR
------- test 7 ----
30 30
...............OOOOO..........
...............O...O..........
...............O...O..........
...............O...O..........
...............O...O..........
...............O...O..........
...............O...O..........
EEEEEEEEEEEEEEEOEEEOEEEEEEEEEE
E..............OOOOO.........E
E............................E
EEIIUUUUUUUUUUUUUUUUUUUUUUUUEE
..I.U...I..............AAAAUA.
..I.U...I..............A...UA.
..I.U...I..............A...UA.
..I.UUUUUUUUUUUUUUUUUUUUUUUUA.
..I.....I..............A....A.
..I.....I..............A....A.
..I.....I..............AAAAAA.
..I.....I.....................
..I.....I.....................
..I.....I.....................
..IIIIIII.....................
..............................
..............................
..............................
..............................
..............................
..............................
..............................
..............................
------- test 8 ----
30 30
..............................
.OOOOOOOOOYYYYYOO.............
.O....PPPPYPPPYPOPP...........
.O....P...Y...Y.O.P...........
.O....P...Y...Y.O.P...........
.O....P...Y...Y.O.P...........
.O....P...Y...Y.O.P...........
.O....P...Y...Y.O.P...........
.O....P...Y...Y.O.P...........
.O....P...Y...Y.O.P...........
.OOOOOOOOOYOOOYOEEEEEEEEE.....
......PPPPYPPPYPEPP.....E.....
..........Y...Y.E.......E.....
..WWWWWWWWWWWWWWWWWTT...E.....
..W...T...Y...Y.E.W.T...E.....
..W...T...Y...Y.E.W.T...E.....
..W...T...Y...Y.E.W.T...E.....
..W...T...YYYYY.EEWEEEEEE.....
UUWWWWWWWWWWWWWWWWW.T.........
U.....TTTTTTTTTTTTQQQQQQQQQQQ.
U....RRRRRRRRRRRRRQRRRRR....Q.
U....R............Q....R....Q.
UIIIIRRRRRRRRRRRRRQRRRRRIIIIQ.
UI................QQQQQQQQQQQ.
UUUUUUUUUUUUUUUUUUU........I..
.IIIIIIIIIIIIIIIIIIIIIIIIIII..
..............................
..............................
..............................
..............................
------- test 9 ----
30 30
.DDDDRRRRQGGGGGGGGGGGGGQQQQQQ.
.DSSDRSSSQGSRSSSSS....G.....Q.
.D..DR...QG.R....SEEEEEEEEE.Q.
.D..DRTTOOGOOOOOOOEOOOGOOOEOOO
.D..DRT.OQG.R....SE...G...ETQO
.D..DRT.OIGFFFFFFFEFFFGIIIEIQO
.D..DRT.CCCCCCCCCSE..FG...EIQO
.D..DRT.CIGFR...CSE..FG...EIQO
.D..DRT.CIGFR...CMEMMFGMMMEIMO
.DBBBBBBBBBBBBBBBBBBBBBBBBEIMO
.DB.DRT.CIGFR...CSE..FG..BEIMO
.DBLDLLHCHGFHHLLCLELLFGLOBEIMO
.DBLDRTHCIGAAAA.CSE..FGL.BEIM.
.DBDDRTHCIGARHA.CSE..FGL.BEIM.
.SBL.RTHCIGARHA.CSE..FGL.BEIM.
.SBLLLLHCIGALHALCLEKKFGKKBEIM.
.SB..RTHCIGARHANCNENNFG.KBEIM.
.SB..RTHCIGARHANCSE..FG.KBEIM.
.SBBBBBBBBBABBABBBBBBBBBBBEIM.
.S...RTHCIGAFFAFCFEFFFG.K.EIM.
.S...RTHCIGAGGAGCGEGGGG.K.EIM.
.S...RTHCIJAJHANCQEEEEEEEEEIM.
.S...RTHCI.AJHANCSK..N..K..IM.
.PPPPPPHCIIAIHAICIIIIIIIIIIIM.
.P...RTHCHHAHHANCSKKKKKKKTTTM.
.P...R.JCCCAAAACCS...N......M.
.P...R.JJJJJJ..NMS...N......M.
.PSSSRSSSSSSRSSNMMMMMMMMMMMMM.
.P...RRRRRRRR..N.....N......P.
.PPPPPPPPPPPPPPNNNNNNNPPPPPPP.

Keep up the good work!
Thanks for your submission!