PersonalCorpus 版 (精华区)
1144196 Big Guava ... 10305 Accepted
0:00.000 64 2002/10/04 13:23:26.806
bool dl[100][100],used[100];
int tryit (int n)
{
int i,j;
for (i=0;i<n;i++) if (!used[i]) {
for (j=0;j<n;j++) if (!used[j]) if (dl[j][i]) break;
if (j==n) {
for (j=0;j<n;j++) dl[i][j]=false;
used[i]=true;
return i;
}
}
return -1;
}
void main()
{
#ifndef ONLINE_JUDGE
freopen("c:\\0acm\\uva\\i10305","r",stdin);
freopen("c:\\0acm\\uva\\o10305","w",stdout);
#endif
int i,j,k,n,m;
scanf("%d%d\n",&n,&m);
while ((m>0)||(n>0)) {
memset(dl,0,sizeof(dl));
memset(used,0,sizeof(used));
for (k=0;k<m;k++) {
scanf("%d%d\n",&i,&j);
dl[i-1][j-1]=true;
}
for (i=0;i<n;i++) {
printf("%d",tryit(n)+1);
if (i==n) printf("\n"); else printf(" ");
}
scanf("%d%d\n",&n,&m);
}
}
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