深度遍历

#include<stdio.h>
#include<string.h>

int mark,k,m,map[101][101],vis[101][101],h[105];

void seek(int mb)
{
    if(h[mb]) return;
    else h[mb] = 1;
    int i,j;
    if(mark)
    {
        printf("%d",mb);
        mark = 0;
    }
    else printf(" %d",mb);
    for(i = 1;i < k; i++)
    {
        if( (map[i][mb] && !vis[i][mb]) || (map[mb][i] && !vis[mb][i]))
        {
            vis[i][mb] = vis[mb][i] = 1;
            seek(i);
        }
    }
}
int main()
{
    int js,u,v,i;
    scanf("%d",&js);
    while(js--)
    {
        memset(map,0,sizeof(map));
        memset(vis,0,sizeof(vis));
        memset(h,0,sizeof(h));
        mark = 1;
        scanf("%d %d",&k,&m);
        for(i = 0;i < m; i++)
        {
            scanf("%d %d",&u,&v);
            if(u > v) map[u][v] = 1;
            else map[v][u] = 1;
        }
        for(i = 0;i < k; i++)
        {
            if(!h[i])
            {
                seek(i);
            }
        }
        printf("\n");
    }
    return 0;
}