HDOJ5044(最近公共祖先)

#include<cstdio>
#include<cstring>
using namespace std;
const int MAX_N=100005;
struct Edge{
    int v,id,next;
}edge[MAX_N*4];
int a[MAX_N],b[MAX_N],to[MAX_N],k[MAX_N],lca[MAX_N];
int head[MAX_N],opr[MAX_N],fa[MAX_N],father[MAX_N];
int cnt;
long long valnode[MAX_N],valedge[MAX_N];
bool type[MAX_N],vis[MAX_N];
void init()
{
    memset(valnode,0,sizeof(valnode));
    memset(valedge,0,sizeof(valedge));
    memset(opr,-1,sizeof(opr));
    memset(head,-1,sizeof(head));
    memset(vis,0,sizeof(vis));
    cnt=0;
}
int findfa(int a)
{
    return father[a]==a?a:findfa(father[a]);
}
void addedge(int u,int v, int id)
{
    edge[cnt].v=v;
    edge[cnt].next=head[u];
    edge[cnt].id=id;
    head[u]=cnt++;
}
void addopr(int u,int v, int id)
{
    edge[cnt].v=v;
    edge[cnt].next=opr[u];
    edge[cnt].id=id;
    opr[u]=cnt++;
}
void LCA(int now, int f)
{
    father[now]=now;
    fa[now]=f;
    vis[now]=true;
    for(int i=opr[now];i!=-1;i=edge[i].next)
    {
        int v=edge[i].v;
        int id=edge[i].id;
        if(vis[v])
            lca[id]=findfa(v);
    }
    for(int i=head[now];i!=-1;i=edge[i].next)
    {
        int v=edge[i].v;
        int id=edge[i].id;
        if(v==f)
            continue;
        LCA(v,now);
        to[id]=v;
        father[v]=now;
    }
}
void getans(int now, int fa)
{
    for(int i=head[now];i!=-1;i=edge[i].next)
    {
        int v=edge[i].v;
        int id=edge[i].id;
        if(v==fa)
            continue;
        getans(v,now);
        valnode[now]+=valnode[v];
        valedge[now]+=valedge[v];
    }
}
int main()
{
    int n,m,t;
    scanf("%d",&t);
    int l=0;
    while(l<t)
    {
        init();
        scanf("%d %d",&n,&m);
        for(int i=0;i<n-1;i++)
        {
            int u,v;
            scanf("%d %d",&u,&v);
            addedge(u,v,i);
            addedge(v,u,i);
        }
        for(int i=0;i<m;i++)
        {
            char str[5];
            scanf("%s",str);
            scanf("%d %d %d",&a[i],&b[i],&k[i]);
            type[i]=str[3]==‘1‘;
            addopr(a[i],b[i],i);
            addopr(b[i],a[i],i);
        }
        LCA(1,-1);
        fa[1]=0;
        for(int i=0;i<m;i++)
        {
            if(type[i])
            {
                valnode[a[i]]+=k[i];
                valnode[b[i]]+=k[i];
                valnode[lca[i]]-=k[i];
                valnode[fa[lca[i]]]-=k[i];
            }
            else
            {
                valedge[a[i]]+=k[i];
                valedge[b[i]]+=k[i];
                valedge[lca[i]]-=k[i]*2;
            }
        }
        getans(1,-1);
        printf("Case #%d:\n",++l);
        for(int i=1;i<=n;i++)
        {
            if(i!=1)
                putchar(‘ ‘);
            printf("%I64d",valnode[i]);
        }
        putchar(‘\n‘);
        for(int i=0;i<n-1;i++)
        {
            if(i)
                putchar(‘ ‘);
            printf("%I64d",valedge[to[i]]);
        }
        puts("");
    }
    return 0;
}