2005-05-18 09:00:00 UTC

# soo sneakier

by Tom

Status: Passed
Results: 18496.2207
CPU Time: 70.9356
Score: 1849.77
Submitted at: 2005-05-18 15:41:24 UTC
Scored at: 2005-05-18 19:40:51 UTC

Current Rank: 3rd
Based on: soo sneaky (diff)

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Code
```function [dy,dx,mark,carry]=solver(main,food,ants,scent)
%18372.39 or 18293.70
rand(1,5);
i35=3:5;
i24=2:4;
i02=0:2;
dirx = [-1,2,2,2,-1; 2,-1,-1,-1,2; 2,0,0,0,2; 2,1,1,1,2; 1,2,2,2,1];
diry = [-1,-1,0,1,1; -1,-1,0,1,1; -1,-1,0,1,1; -1,-1,0,1,1; -1,-1,0,1,1];
% find reachable regions
BAD=main<0;
if BAD(7)
BAD(1)=1;
BAD(2)=BAD(2)||BAD(8);
BAD(3)=BAD(3)||(BAD(8)&&BAD(9));
BAD(6)=BAD(6)||BAD(12);
BAD(11)=BAD(11)||(BAD(12)&&BAD(17));
% modify current board based on reachable regions
main(BAD)=-1;
food(BAD)=0;
scent(BAD)=0;
end
if BAD(9)
BAD(4)=BAD(4)||BAD(8);
BAD(5)=1;
BAD(10)=BAD(10)||BAD(14);
% modify current board based on reachable regions
main(BAD)=-1;
food(BAD)=0;
scent(BAD)=0;
end
if BAD(17)
BAD(16)=BAD(16)||BAD(12);
BAD(21)=1;
BAD(22)=BAD(22)||BAD(18);
% modify current board based on reachable regions
main(BAD)=-1;
food(BAD)=0;
scent(BAD)=0;
end
if BAD(19)
BAD(15)=BAD(15)||(BAD(9)&&BAD(14));
BAD(20)=BAD(20)||(BAD(14));
BAD(23)=BAD(23)||(BAD(17)&&BAD(18));
BAD(24)=BAD(24)||(BAD(18));
BAD(25)=1;
% modify current board based on reachable regions
main(BAD)=-1;
food(BAD)=0;
scent(BAD)=0;
end
BAD(13)=1;
% setup game stats
scents=scent(scent>0);
maxscent=max(scents(:));
% mark this field
if (max(main(:)))
mark=400-scent(13);
scent(13)=400;
init=0;
hills=find(main>0);
scent(hills)=1e7;
food(hills)=0;
if isempty(scents);maxscent=mark;end
elseif (maxscent==min(scents(:))) % init phase
mark=maxscent-scent(13);
scent(13)=maxscent;
init=1;
elseif isempty(scents) % nothing is marked
mark=98;
scent(13)=scent(13)+98;
maxscent=mark;
init=1;
else
mark=maxscent-1-scent(13);
scent(13)=maxscent-1;
init=0;
end
% look around for food
if max(food(:))<1 ||init % nothing found or no way home, search
target=maxscent-scent;target(BAD)=-1;
[y,x]=find(target==max(target(:)));
if (numel(y)>1)
r=ceil(rand*numel(y));
y=y(r);
x=x(r);
end
carry=food(13)>0;
dx = dirx(x,y);
if dx<2
dy = diry(x,y);
return;
end;
m(7,7)=0;
m(y+i02,x+i02)=1;
m=m(i35,i35);
t=target(i24,i24).*m+m;
[dy,dx]=find(t==max(t(:)));
r=ceil(rand*numel(dy));
dy=dy(r)-2;
dx=dx(r)-2;
return;
end;
if (food(13)>1)&&rand<.95 % sit on a lot of food, go home
target=scent;target(BAD)=-1;
[y,x]=find(target==max(target(:)));
if (numel(y)>1)
y=y(1);
x=x(1);
end
carry=1;
dx = dirx(x,y);
if dx<2
dy = diry(x,y);
return;
end;
m(7,7)=0;
m(y+i02,x+i02)=1;
m=m(i35,i35);
t=target(i24,i24).*m+m;
[dy,dx]=find(t==max(t(:)));
r=ceil(rand*numel(dy));
dy=dy(r)-2;
dx=dx(r)-2;
return;
end;
if (food(13) >= 1) % sit on one food, build track
target=scent;target(BAD)=-1;
[yhome,xhome]=find(target==max(target(:)));
lowfood=food;lowfood(scent>=scent(13))=0;
carry=1;
dhere=max(max(abs(yhome-3),abs(xhome-3)));
runs=numel(lowfood(lowfood(:)>0));
lowfood(i24,i24)=lowfood(i24,i24)*1e8;
target=lowfood;target(BAD)=-1;
while runs % fetch food behind
[y,x]=find(target==max(target(:)));
if (numel(y)>1)
r=ceil(rand*numel(y));
y=y(r);
x=x(r);
end
dx = dirx(x,y);
if dx<2
dy = diry(x,y);
else
m(7,7)=0;
m(y+i02,x+i02)=1;
m=m(i35,i35);
t=target(i24,i24).*m+m;
[dy,dx]=find(t==max(t(:)));
r=ceil(rand*numel(dy));
dy=dy(r)-2;
dx=dx(r)-2;
end
if ( min(max(abs(yhome-y),abs(xhome-x))) > dhere )
carry=0;
return;
end
target(y,x)=0;runs=runs-1;
end
if (carry) % go home
target=scent;target(BAD)=-1;
[y,x]=find(target==max(target(:)));
if (numel(y)>1)
r=ceil(rand*numel(y));
y=y(r);
x=x(r);
end
dx = dirx(x,y);
if dx<2
dy = diry(x,y);
return;
end;
m(7,7)=0;
m(y+i02,x+i02)=1;
m=m(i35,i35);
t=target(i24,i24).*m+m;
[dy,dx]=find(t==max(t(:)));
r=ceil(rand*numel(dy));
dy=dy(r)-2;
dx=dx(r)-2;
return;
end
return;
end;
target=max(food-ants,0);target(BAD)=-1000;
[y,x]=find(target==max(target(:)));
if (numel(y)>1)
r=ceil(rand*numel(y));
y=y(r);
x=x(r);
end
carry=0;
dx = dirx(x,y);
if dx<2
dy = diry(x,y);
return;
end;
m(7,7)=0;
m(y+i02,x+i02)=1;
m=m(i35,i35);
t=target(i24,i24).*m+m;
[dy,dx]=find(t==max(t(:)));
r=ceil(rand*numel(dy));
dy=dy(r)-2;
dx=dx(r)-2;```