bzoj 1433 二分图匹配

裸地匈牙利或者最大流,直接匹配就行了

需要注意的是(我就没注意细节WA了好多次。。。)

每个人和自己之间的边是0,但是应该是1

不是在校生是没有床的。。。。

/**************************************************************
    Problem: 1433
    User: BLADEVIL
    Language: Pascal
    Result: Accepted
    Time:84 ms
    Memory:268 kb
****************************************************************/
 
//By BLADEVIL
var
    t, n, m                 :longint;
    i                       :longint;
    size                    :array[0..100] of longint; 
    know                    :array[0..100,0..100] of longint;
    flag, bed               :array[0..100] of boolean;
    link                    :array[0..100] of longint;
     
function find(x:longint):boolean;
var
    i                       :longint;
begin
    for i:=1 to n do
        if know[x,i]=1 then
            if (not flag[i]) and (bed[i]) then
            begin
                flag[i]:=true;
                if (link[i]=0) or (find(link[i])) then
                begin
                    link[i]:=x;
                    exit(true);
                end;
            end;
    exit(false);
end;
     
procedure main;
var
    i, j                    :longint;
    x                       :longint;
    ans, sum                :longint;
begin
    read(n);
    fillchar(link,sizeof(link),0);
    fillchar(size,sizeof(size),0);
    fillchar(know,sizeof(know),0);
    fillchar(bed,sizeof(bed),false);
    for i:=1 to n do read(size[i]);
    for i:=1 to n do if size[i]=1 then bed[i]:=true;
    for i:=1 to n do
    begin
        read(x);
        if (size[i]=1) and (x=0) then size[i]:=0;
    end;
    for i:=1 to n do
        for j:=1 to n do read(know[i,j]);
    for i:=1 to n do know[i,i]:=1;
    ans:=0; sum:=0;
    for i:=1 to n do if size[i]=0 then inc(sum);
    for i:=1 to n do
        if size[i]=0 then
        begin
            fillchar(flag,sizeof(flag),false);
            if find(i) then inc(ans);
        end;
    if sum=ans then writeln('^_^') else writeln('T_T');
end;
     
begin
    read(t);
    for i:=1 to t do main;
end.

 

posted on 2013-12-12 00:09  BLADEVIL  阅读(258)  评论(0编辑  收藏

统计