1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <sys/time.h>
#define S (5)
using namespace std;
int index_deltas[8][2]={{0,-1},{1,-1},{1,0},{1,1},{0,1},{-1,1},{-1,0},{-1,-1}};
class Move{
public:
int neudir,from,dir;
string str(void){
stringstream ss;
ss<<neudir<<' '<<from<<' '<<dir;
return ss.str();
}
};
class Board{
public:
int grid[S*S];
int neuidx;
Board(void):neuidx(0){
memset(grid,0,S*S*sizeof(int));
grid[S*(S/2)+S/2]=3;
for(int i=0;i<S;i++){
grid[i]=1;
grid[S*(S-1)+i]=2;
}
}
int moved(int at,int dir){
int x=at%S,y=at/S,x2,y2;
while(true){
x2=x+index_deltas[dir][0];
y2=y+index_deltas[dir][1];
if(x2<0||x2>=S||y2<0||y2>=S||grid[S*y2+x2]!=0)return S*y+x;
x=x2;
y=y2;
}
}
bool move(int at,int dir){
int newat=moved(at,dir);
if(newat==at)return false;
grid[newat]=grid[at];
grid[at]=0;
if(grid[newat]==3)neuidx=newat;
return true;
}
void undomove(int at,int dir){
int movedidx=moved(at,dir);
movedidx+=S*index_deltas[dir][1]+index_deltas[dir][0];
grid[at]=grid[movedidx];
grid[movedidx]=0;
if(grid[at]==3)neuidx=at;
}
bool isvalid(Move mv){
int oldneuidx=neuidx;
if(!move(oldneuidx,mv.neudir)){
undomove(oldneuidx,mv.neudir);
return false;
}
if(!move(mv.from,mv.dir)){
undomove(mv.from,mv.dir);
undomove(oldneuidx,mv.neudir);
return false;
}
undomove(mv.from,mv.dir);
undomove(oldneuidx,mv.neudir);
return true;
}
};
Move calculate_move(Board &bd){
vector<Move> poss;
Move m;
int nd,fr,d;
int newneu,newidx;
for(nd=0;nd<8;nd++){
newneu=bd.moved(bd.neuidx,nd);
if(newneu==bd.neuidx)continue;
for(fr=0;fr<S*S;fr++){
if(bd.grid[fr]!=1)continue;
for(d=0;d<8;d++){
newidx=bd.moved(fr,d);
if(newidx==fr)continue;
m.neudir=nd;
m.from=fr;
m.dir=d;
poss.push_back(m);
}
}
}
return poss[rand()%poss.size()];
}
bool should_flip_board=false;
inline int flip_index(int idx){
return S*(S-1-idx/S)+S-1-idx%S;
}
inline int flip_dir(int dir){
return (dir+4)%8;
}
Move protocol_get_move(void){
Move m;
cin>>m.neudir>>m.from>>m.dir;
if(should_flip_board){
m.from=flip_index(m.from);
m.dir=flip_dir(m.dir);
}
return m;
}
void protocol_put_move(Move m){
if(should_flip_board){
cout<<m.neudir<<' '<<flip_index(m.from)<<' '<<flip_dir(m.dir)<<endl;
} else {
cout<<m.neudir<<' '<<m.from<<' '<<m.dir<<endl;
}
}
int main(void){
Board bd;
Move mv;
string line;
struct timeval tv;
gettimeofday(&tv,NULL);
cerr<<"seed="<<(1000000*tv.tv_sec+tv.tv_usec)<<endl;
srand(1000000*tv.tv_sec+tv.tv_usec);
getline(cin,line);
if(line=="go"){
should_flip_board=false;
mv.neudir=-1; mv.from=0; mv.dir=4;
protocol_put_move(mv);
} else {
if(line!="nogo")cerr<<"no0b "<<line<<" not in (go,nogo)"<<endl;
should_flip_board=true;
mv=protocol_get_move();
bd.move(mv.from,mv.dir);
mv=calculate_move(bd);
if(!bd.isvalid(mv)){
cerr<<"calculate_move gave invalid move "<<mv.str()<<endl;
return 1;
}
bd.move(bd.neuidx,mv.neudir);
bd.move(mv.from,mv.dir);
protocol_put_move(mv);
}
while(true){
mv=protocol_get_move();
bd.move(mv.from,mv.dir);
mv=calculate_move(bd);
if(!bd.isvalid(mv)){
cerr<<"calculate_move gave invalid move "<<mv.str()<<endl;
return 1;
}
bd.move(bd.neuidx,mv.neudir);
bd.move(mv.from,mv.dir);
protocol_put_move(mv);
}
return 0;
}
|
