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## Discussion of Problem 1045. Funny Game

O,I need help,can you tell me why this wrong,thank you
Posted by sherry 31 Jul 2008 13:42
#include<stdio.h>
#include<stdlib.h>
#define MAX 1002
int join[MAX][MAX],cont[MAX],used[MAX],win[MAX];
int np,mark,fri;
int tree(int aa)
{
int i,j,k,mar=0,min1=MAX,min2=MAX;
used[aa]=1;
if(cont[aa]==1&&aa!=fri)//!!cout为1可为终点，亦可为起点~！！
{
win[aa]=aa;
return 0;
}
for(i=1;i<=np;i++)
{
if(join[aa][i]&&!used[i])
{

k=tree(i);
if(!k&&min1>win[i])
{
mar=1;
min1=win[i];
}
if(k&&min2>win[i])
min2=win[i];
}
}
if(mar)
{
win[aa]=min1;
return 1;
}
else
{
win[aa]=min2;
return 0;
}
}

int main()
{
int i,j,k,mar=0;
scanf("%d%d",&np,&fri);
for(i=1;i<np;i++)
{
scanf("%d%d",&j,&k);
join[j][k]=1;
join[k][j]=1;
cont[j]++;
cont[k]++;
}
k=tree(fri);
if(k)printf("First player wins flying to airport %d\n",win[fri]);
else printf("First player loses\n");
//    system("pause");
return 0;
}

Re: O,I need help,can you tell me why this wrong,thank you
Posted by sherry 31 Jul 2008 14:05
I find where I made the mistake,
I just misunderstand the porblem...