Codeforce-191C-Fools and Roads (樹鏈剖分 更新邊權)

C. Fools and Roads

time limit per test:2 seconds

memory limit per test:256 megabytes

input:standard input

output:standard output

They say that Berland has exactly two problems, fools and roads. Besides, Berland has n cities, populated by the fools and connected by the roads. All Berland roads are bidirectional. As there are many fools in Berland, between each pair of cities there is a path (or else the fools would get upset). Also, between each pair of cities there is no more than one simple path (or else the fools would get lost).

But that is not the end of Berland's special features. In this country fools sometimes visit each other and thus spoil the roads. The fools aren't very smart, so they always use only the simple paths.

A simple path is the path which goes through every Berland city not more than once.

The Berland government knows the paths which the fools use. Help the government count for each road, how many distinct fools can go on it.

Note how the fools' paths are given in the input.

Input

The first line contains a single integer n (2 ≤ n ≤ 10⁵) — the number of cities.

Each of the next n - 1 lines contains two space-separated integers u_i, v_i (1 ≤ u_i, v_i ≤ n, u_i ≠ v_i), that means that there is a road connecting cities u_i and v_i.

The next line contains integer k (0 ≤ k ≤ 10⁵) — the number of pairs of fools who visit each other.

Next k lines contain two space-separated numbers. The i-th line (i > 0) contains numbers a_i, b_i (1 ≤ a_i, b_i ≤ n). That means that the fool number 2i - 1 lives in city a_i and visits the fool number 2i, who lives in city b_i. The given pairs describe simple paths, because between every pair of cities there is only one simple path.

Output

Print n - 1 integer. The integers should be separated by spaces. The i-th number should equal the number of fools who can go on the i-th road. The roads are numbered starting from one in the order, in which they occur in the input.

Examples

Input

5
1 2
1 3
2 4
2 5
2
1 4
3 5

Output

2 1 1 1 

Input

5
3 4
4 5
1 4
2 4
3
2 3
1 3
3 5

Output

3 1 1 1 

Note

In the first sample the fool number one goes on the first and third road and the fool number 3 goes on the second, first and fourth ones.

In the second sample, the fools number 1, 3 and 5 go on the first road, the fool number 5 will go on the second road, on the third road goes the fool number 3, and on the fourth one goes fool number 1.

題意：給你一個無向圖，然後人可以從一個點走到另一個點，問最後每條路唄走了幾次；

思路：樹鏈剖分裸題，維護邊權，然後按輸入順序輸出每條邊的次數

AC代碼：

#include<iostream>
#include<cstring>
#include<cstdio>
#include<algorithm>
#include<string>
#include<sstream>
#define maxn 150000
using namespace std;
int n,k,tot,num;
struct E{int x;int y;}e[maxn];
struct Edge{int to;int next;}edge[maxn*2];
int dep[maxn],son[maxn],sz[maxn],fa[maxn],id[maxn],top[maxn],head[maxn];
void add_edge(int u,int v)
{
    edge[++tot].to=v;
    edge[tot].next=head[u];
    head[u]=tot;
}
void dfs1(int u,int f,int deep)
{
    dep[u]=deep;
    sz[u]=1;
    son[u]=0;
    fa[u]=f;
    for(int i=head[u];i!=-1;i=edge[i].next)
    {
        int ff=edge[i].to;
        if(ff==f)continue;
        dfs1(ff,u,deep+1);
        sz[u]+=sz[ff];
        if(sz[son[u]]<sz[ff])
            son[u]=ff;
    }
}
void dfs2(int u,int tp)
{
    top[u]=tp;
    id[u]=++num;
    if(son[u])dfs2(son[u],tp);
    for(int i=head[u];i!=-1;i=edge[i].next)
    {
        int ff=edge[i].to;
        if(ff==fa[u]||ff==son[u])continue;
        dfs2(ff,ff);
    }
}struct node
{
    int l;
    int r;
    int tag;
}tree[maxn*4];
void build(int root,int l,int r)
{
    tree[root].l=l;
    tree[root].r=r;
    tree[root].tag=0;
    if(l==r) return;
    int mid=(l+r)>>1;
    build(root<<1,l,mid);
    build(root<<1|1,mid+1,r);
}
void pushdown(int root)
{
    if(tree[root].tag)
    {
        tree[root<<1].tag+=tree[root].tag;
        tree[root<<1|1].tag+=tree[root].tag;
        tree[root].tag=0;
    }
}
void update(int root,int l,int r,int val)
{
    int ll=tree[root].l;
    int rr=tree[root].r;
    if(l<=ll&&rr<=r)
    {
        tree[root].tag+=val;
        return;
    }
    pushdown(root);
    int mid=(ll+rr)>>1;
    if(l<=mid) update(root<<1,l,r,val);
    if(r>mid) update(root<<1|1,l,r,val);
}
int query(int root,int p)
{
    int ll=tree[root].l;
    int rr=tree[root].r;
    if(ll==rr)
        return tree[root].tag;
    pushdown(root);
    int mid=(ll+rr)>>1;
    if(p<=mid)
        return query(root<<1,p);
    else
        return query(root<<1|1,p);
}
void Yougth(int u,int v)
{
    int tp1=top[u];
    int tp2=top[v];
    while(tp1!=tp2)
    {
        if(dep[tp1]<dep[tp2])
        {
            swap(u,v);
            swap(tp1,tp2);
        }
        update(1,id[tp1],id[u],1);
        u=fa[tp1];
        tp1=top[u];
    }
    if(u==v) return;
    if(dep[u]>dep[v]) swap(u,v);
    update(1,id[son[u]],id[v],1);
}
void init()
{
    tot=num=0;
    memset(head,-1,sizeof(head));
}
int main()
{
    while(~scanf("%d",&n))
    {
        init();
        int x,y;
        for(int i=1;i<=n-1;i++)
        {
            scanf("%d%d",&e[i].x,&e[i].y);
            add_edge(e[i].x,e[i].y);
            add_edge(e[i].y,e[i].x);
        }
        dfs1(1,0,1);
        dfs2(1,1);
        for(int i=1;i<n;i++)
        {
            if(dep[e[i].x]>dep[e[i].y])
                swap(e[i].x,e[i].y);
        }
        build(1,1,n);
        scanf("%d",&k);
        while(k--)
        {
            scanf("%d%d",&x,&y);
            Yougth(x,y);
        }
        for(int i=1;i<n;i++)
            printf("%d%c",query(1,id[e[i].y]),i==n-1?'\n':' ');
    }
    return 0;
}