未完成
#include<cstdio>
#include<iostream>
using namespace std;
struct ss
{
int l,r,gai,jia,zhi;
} shu[400008];
int n,head[100005],next[200005],u[200005],v[200006],cnt=1,id[100005];
int deep[100005],size[100005],lc[100005][20],n1,dui[100005],lian[100005];
void jiabian(int a1,int a2,int a3)
{
cnt++;
next[cnt]=head[a1];
head[a1]=cnt;
u[cnt]=a2;
v[cnt]=a3;
return;
}
void shu1(int a1)
{
printf("%d %d %d %d %d
",shu[a1].l,shu[a1].r,shu[a1].zhi,shu[a1].gai,shu[a1].jia);
if(shu[a1].l==shu[a1].r)
return;
shu1(a1*2);
shu1(a1*2+1);
return;
}
void gengxin(int a1)
{
if(shu[a1].l==shu[a1].r)
return;
if(shu[a1].gai!=-1)
{
shu[a1<<1].zhi=shu[a1<<1|1].zhi=shu[a1].gai;
shu[a1<<1].gai=shu[a1<<1|1].gai=shu[a1].gai;
shu[a1<<1].jia=shu[a1<<1|1].jia=0;
shu[a1].gai=-1;
}
if(shu[a1].jia!=0)
{
shu[a1*2].zhi+=shu[a1].jia;
if(shu[a1*2].gai==-1)
shu[a1*2].jia+=shu[a1].jia;
else
shu[a1*2].gai+=shu[a1].jia;
if(shu[a1*2+1].gai==-1)
shu[a1*2+1].jia+=shu[a1].jia;
else
shu[a1*2+1].gai+=shu[a1].jia;
shu[a1<<1|1].zhi+=shu[a1].jia;
shu[a1].jia=0;
}
}
void xianjia(int a1,int a2,int a3,int a4)
{
if(shu[a1].l>=a2&&shu[a1].r<=a3)
{
shu[a1].zhi+=a4;
if(shu[a1].gai!=-1)
shu[a1].gai+=a4;
else
shu[a1].jia+=a4;
return;
}
gengxin(a1);
int mid=(shu[a1].l+shu[a1].r)>>1;
if(a2<=mid)
xianjia(a1<<1,a2,a3,a4);
if(a3>mid)
xianjia(a1<<1|1,a2,a3,a4);
shu[a1].zhi=max(shu[a1<<1].zhi,shu[a1<<1|1].zhi);
return;
}
void build(int a1,int a2,int a3)
{
shu[a1].l=a2;
shu[a1].r=a3;
shu[a1].gai=-1;
if(a2==a3)
return;
int mid=(a2+a3)>>1;
build(a1<<1,a2,mid);
build(a1<<1|1,mid+1,a3);
return;
}
void dfs1(int a1,int a2)
{
size[a1]=1;
for(int i=1;i<=16;i++)
{
if(deep[a1]<1<<i)
break;
lc[a1][i]=lc[lc[a1][i-1]][i-1];
}
for(int i=head[a1];i;i=next[i])
if(u[i]!=a2)
{
deep[u[i]]=deep[a1]+1;
lc[u[i]][0]=a1;
dfs1(u[i],a1);
size[a1]+=size[u[i]];
}
return;
}
void dfs2(int a1,int a2)
{
n1++;
dui[a1]=n1;
lian[a1]=a2;
int k=0;
for(int i=head[a1];i;i=next[i])
if(deep[a1]<deep[u[i]])
{
if(size[u[i]]>size[k])
k=u[i];
}
else
{
xianjia(1,dui[a1],dui[a1],v[i]);
id[i>>1]=a1;
//shu1(1);
//printf("
");
}
if(k==0)
return;
dfs2(k,a2);
for(int i=head[a1];i;i=next[i])
if(deep[a1]<deep[u[i]]&&k!=u[i])
dfs2(u[i],u[i]);
}
int lca(int a1,int a2)
{
if(deep[a1]<deep[a2])
swap(a1,a2);
int t=deep[a1]-deep[a2];
for(int i=0;i<=16;i++)
if(t&(1<<i))
a1=lc[a1][i];
for(int i=16;i>=0;i--)
if(lc[a1][i]!=lc[a2][i])
{
a1=lc[a1][i];
a2=lc[a2][i];
}
if(a1==a2)
return a1;
else
return lc[a1][0];
}
void lianjia(int a1,int a2,int a3)
{
for(;lian[a1]!=lian[a2];)
{
xianjia(1,dui[lian[a1]],dui[a1],a3);
a1=lc[lian[a1]][0];
}
if(dui[a2]+1<=dui[a1])
xianjia(1,dui[a2]+1,dui[a1],a3);
return;
}
void xiangai(int a1,int a2,int a3,int a4)
{
if(shu[a1].l>=a2&&shu[a1].r<=a3)
{
shu[a1].zhi=a4;
shu[a1].gai=a4;
return;
}
gengxin(a1);
int mid=(shu[a1].l+shu[a1].r)>>1;
if(a2<=mid)
xiangai(a1<<1,a2,a3,a4);
if(a3>mid)
xiangai(a1<<1|1,a2,a3,a4);
shu[a1].zhi=max(shu[a1<<1].zhi,shu[a1<<1|1].zhi);
return;
}
void liangai(int a1,int a2,int a3)
{
for(;lian[a1]!=lian[a2];)
{
xiangai(1,dui[lian[a1]],dui[a1],a3);
a1=lc[lian[a1]][0];
}
if(dui[a2]+1<=dui[a1])
xiangai(1,dui[a2]+1,dui[a1],a3);
return;
}
int xianmax(int a1,int a2,int a3)
{
if(shu[a1].l>=a2&&shu[a1].r<=a3)
return shu[a1].zhi;
gengxin(a1);
int mid=(shu[a1].l+shu[a1].r)>>1,ma=-2147483647;
if(a2<=mid)
ma=max(ma,xianmax(a1<<1,a2,a3));
if(a3>mid)
ma=max(ma,xianmax(a1<<1|1,a2,a3));
return ma;
}
int lianzhao(int a1,int a2)
{
int max1=-2147483647;
for(;lian[a1]!=lian[a2];)
{
max1=max(max1,xianmax(1,dui[lian[a1]],dui[a1]));
a1=lc[lian[a1]][0];
}
if(dui[a2]+1<=dui[a1])
max1=max(max1,xianmax(1,dui[a2]+1,dui[a1]));
return max1;
}
void xunwen()
{
char ch[10];
for(;1;)
{
int a1,a2,a3,t;
scanf("%s",ch);
if(ch[1]=='t')
return;
scanf("%d%d",&a1,&a2);
if(ch[1]=='a')
{
t=lca(a1,a2);
printf("%d
",max(lianzhao(a1,t),lianzhao(a2,t)));
}
if(ch[1]=='d')
{
scanf("%d",&a3);
t=lca(a1,a2);
//printf("%d %d
",t,t);
lianjia(a1,t,a3);
lianjia(a2,t,a3);
}
if(ch[1]=='o')
{
scanf("%d",&a3);
t=lca(a1,a2);
// printf("%d %d
",t,t);
liangai(a1,t,a3);
liangai(a2,t,a3);
}
if(ch[1]=='h')
{
xiangai(1,dui[id[a1]],dui[id[a1]],a2);
//shu1(1);printf("
");
}
}
}
int main()
{
freopen("sj.txt","r",stdin);
freopen("1.txt","w",stdout);
scanf("%d",&n);
for(int i=0;i<n-1;i++)
{
int a1,a2,a3;
scanf("%d%d%d",&a1,&a2,&a3);
jiabian(a1,a2,a3);
jiabian(a2,a1,a3);
}
build(1,1,n);
dfs1(1,0);
dfs2(1,1);
xunwen();
}