#include<bits/stdc++.h>
using namespace std;
#define all(fl) fl.begin(),fl.end()
#define pb push_back
#define fi first
#define se second
#define for1(i,f,g) for (int i=f;i<=g;i++)
#define for2(i,f,g) for (int i=f;i>=g;i--)
#define for3(i,f,g,h) for(int i=f;i<=g;i+=h)
#define lb lower_bound
#define ub upper_bound
#define sz(a) (int)a.size()
#define pii pair<int,int>
#define pli pair<long long,int>
#define gcd __gcd
#define lcm(x,y) x*y/__gcd(x,y)
const int maxn=1e5+9;
int n,m,q;
struct edg1{
int u,v,w;
}cp[maxn];
struct edg{
int v,w;
};
vector<edg>a[maxn];
struct checkpoint{
int p;
long long c;
bool operator < (const checkpoint &pp){
return c<pp.c;
}
}b[maxn];
int in[maxn];
int out[maxn];
int dep[maxn];
int rm[maxn][19];
int dis[maxn];
int tme=0;
void dfs(int u,int par){
in[u]=++tme;
for (auto v:a[u]){
if (v.v==par)continue;
rm[v.v][0]=u;
dis[v.v]=dis[u]+1;
for1(i,1,18){
rm[v.v][i]=rm[rm[v.v][i-1]][i-1];
}
dep[v.v]=dep[u]+v.w;
//cerr<<u<<" "<<v.v<<" "<<v.w<<'\n';
dfs(v.v,u);
}
out[u]=tme;
}
int lca(int u,int v){
if (dis[u]<dis[v])swap(u,v);
int k=dis[u]-dis[v];
for1(i,0,18){
if (k>>i&1)u=rm[u][i];
}
if (u==v)return u;
for2(i,18,0){
if (!rm[u][i]||!rm[v][i])continue;
if (rm[u][i]!=rm[v][i]){
u=rm[u][i];
v=rm[v][i];
}
}
return rm[u][0];
}
pli bit[maxn];
void add(int u,long long val){
for (;u<=n;u+=(u-(u&(u-1)))){
bit[u].fi+=val;
if (val>0)bit[u].se++;
else bit[u].se--;
}
}
pli get(int u){
pli sum;
for (;u>=1;u-=(u-(u&(u-1)))){
sum.fi+=bit[u].fi;
sum.se+=bit[u].se;
}
return sum;
}
int s[maxn];
int t[maxn];
long long x[maxn];
long long y[maxn];
int par[maxn];
struct cnp{
long long l,r,num,ans,cost;
cnp(){
l=1,r=1e9,num=0,ans=0,cost=0;
}
}d[maxn];
struct query{
long long mid;
int id;
bool operator < (const query &p){
return mid<p.mid;
}
};
vector<int>ver[maxn];
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
//freopen("usaco.INP","r",stdin);
//freopen("usaco.OUT","w",stdout);
cin>>n>>m>>q;
map<int,int>nenso;
vector<int>nen;
nen.pb(0);
for1(i,1,n-1){
int u,v;
cin>>u>>v;
cp[i].u=u,cp[i].v=v;
cp[i].w=0;
}
for1(i,1,m){
cin>>b[i].p>>b[i].c;
nen.pb(b[i].c);
cp[b[i].p].w++;
//cerr<<b[i].p<<'\n';
}
sort(all(nen));
for1(i,1,sz(nen)-1){
if (nen[i]>nen[i-1]){
nenso[nen[i]]=nenso[nen[i-1]]+1;
}
}
for1(i,1,m){
ver[nenso[b[i].c]].pb(i);
}
//cout<<cp[2].u<<" "<<cp[2].v<<'\n';
for1(i,1,n-1){
a[cp[i].u].pb({cp[i].v,cp[i].w});
a[cp[i].v].pb({cp[i].u,cp[i].w});
}
dfs(1,0);
for1(i,1,n-1){
if (in[cp[i].u]>in[cp[i].v])swap(cp[i].u,cp[i].v);
}
for1(i,1,q){
cin>>s[i]>>t[i]>>x[i]>>y[i];
par[i]=lca(s[i],t[i]);
d[i].l=1;
d[i].r=sz(nen)-1;
}
sort(b+1,b+1+m);
while (true){
vector<query>pr;
for1(i,1,q){
if (d[i].l<=d[i].r){
pr.pb({(d[i].l+d[i].r)/2,i});
}
}
if (pr.empty())break;
sort(all(pr));
int nw=0;
for1(i,1,n)bit[i].fi=bit[i].se=0;
for (auto v:pr){
for1(i,nw+1,v.mid){
int id=b[i].p;
add(in[cp[id].v],b[i].c);
add(out[cp[id].v]+1,-b[i].c);
}
nw=v.mid;
pli t1=get(in[s[v.id]]);
pli t2=get(in[t[v.id]]);
pli t3=get(in[par[v.id]]);
pli temp;
temp.fi=t1.fi+t2.fi-2*t3.fi;
temp.se=t1.se+t2.se-2*t3.se;
//cout<<d[v.id].l<<" "<<d[v.id].r<<" "<<v.mid<<" "<<temp.fi<<" "<<temp.se<<'\n';
if (temp.fi<=y[v.id]){
d[v.id].l=v.mid+1;
d[v.id].num=temp.se;
d[v.id].ans=nen[v.mid];
d[v.id].cost=temp.fi;
}
else {
d[v.id].r=v.mid-1;
}
}
}
for1(i,1,q){
long long num=dep[s[i]]+dep[t[i]]-2*dep[par[i]]-d[i].num;
if (num>x[i])cout<<-1<<'\n';
else cout<<x[i]-num<<'\n';
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
8916 KB |
Output is correct |
2 |
Correct |
5 ms |
8916 KB |
Output is correct |
3 |
Correct |
4 ms |
8940 KB |
Output is correct |
4 |
Correct |
4 ms |
8944 KB |
Output is correct |
5 |
Correct |
8 ms |
9592 KB |
Output is correct |
6 |
Correct |
10 ms |
9600 KB |
Output is correct |
7 |
Correct |
8 ms |
9544 KB |
Output is correct |
8 |
Correct |
9 ms |
9684 KB |
Output is correct |
9 |
Correct |
9 ms |
9596 KB |
Output is correct |
10 |
Correct |
10 ms |
9684 KB |
Output is correct |
11 |
Correct |
9 ms |
9592 KB |
Output is correct |
12 |
Correct |
9 ms |
9708 KB |
Output is correct |
13 |
Correct |
9 ms |
9840 KB |
Output is correct |
14 |
Correct |
9 ms |
9728 KB |
Output is correct |
15 |
Correct |
9 ms |
9684 KB |
Output is correct |
16 |
Correct |
14 ms |
9768 KB |
Output is correct |
17 |
Correct |
9 ms |
9716 KB |
Output is correct |
18 |
Correct |
9 ms |
9724 KB |
Output is correct |
19 |
Correct |
9 ms |
9672 KB |
Output is correct |
20 |
Correct |
9 ms |
9600 KB |
Output is correct |
21 |
Correct |
8 ms |
9592 KB |
Output is correct |
22 |
Correct |
10 ms |
9712 KB |
Output is correct |
23 |
Correct |
9 ms |
9632 KB |
Output is correct |
24 |
Correct |
9 ms |
9596 KB |
Output is correct |
25 |
Correct |
10 ms |
9684 KB |
Output is correct |
26 |
Correct |
8 ms |
9684 KB |
Output is correct |
27 |
Correct |
8 ms |
9684 KB |
Output is correct |
28 |
Correct |
9 ms |
9680 KB |
Output is correct |
29 |
Correct |
8 ms |
9684 KB |
Output is correct |
30 |
Correct |
9 ms |
9556 KB |
Output is correct |
31 |
Correct |
9 ms |
9556 KB |
Output is correct |
32 |
Correct |
10 ms |
9560 KB |
Output is correct |
33 |
Correct |
8 ms |
9856 KB |
Output is correct |
34 |
Correct |
9 ms |
9856 KB |
Output is correct |
35 |
Correct |
9 ms |
9812 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
8944 KB |
Output is correct |
2 |
Correct |
10 ms |
9556 KB |
Output is correct |
3 |
Correct |
11 ms |
9556 KB |
Output is correct |
4 |
Correct |
9 ms |
9496 KB |
Output is correct |
5 |
Correct |
377 ms |
34468 KB |
Output is correct |
6 |
Correct |
457 ms |
32424 KB |
Output is correct |
7 |
Correct |
433 ms |
33848 KB |
Output is correct |
8 |
Correct |
359 ms |
32668 KB |
Output is correct |
9 |
Correct |
338 ms |
31396 KB |
Output is correct |
10 |
Correct |
535 ms |
38276 KB |
Output is correct |
11 |
Correct |
535 ms |
38320 KB |
Output is correct |
12 |
Correct |
560 ms |
38312 KB |
Output is correct |
13 |
Correct |
547 ms |
38304 KB |
Output is correct |
14 |
Correct |
543 ms |
38288 KB |
Output is correct |
15 |
Correct |
617 ms |
45520 KB |
Output is correct |
16 |
Correct |
589 ms |
45960 KB |
Output is correct |
17 |
Correct |
614 ms |
45052 KB |
Output is correct |
18 |
Correct |
636 ms |
38140 KB |
Output is correct |
19 |
Correct |
653 ms |
38124 KB |
Output is correct |
20 |
Correct |
662 ms |
38228 KB |
Output is correct |
21 |
Correct |
536 ms |
37856 KB |
Output is correct |
22 |
Correct |
497 ms |
38032 KB |
Output is correct |
23 |
Correct |
535 ms |
38076 KB |
Output is correct |
24 |
Correct |
491 ms |
38020 KB |
Output is correct |
25 |
Correct |
498 ms |
38596 KB |
Output is correct |
26 |
Correct |
457 ms |
38604 KB |
Output is correct |
27 |
Correct |
509 ms |
38584 KB |
Output is correct |
28 |
Correct |
404 ms |
38120 KB |
Output is correct |
29 |
Correct |
424 ms |
38200 KB |
Output is correct |
30 |
Correct |
428 ms |
38356 KB |
Output is correct |
31 |
Correct |
445 ms |
38360 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
8916 KB |
Output is correct |
2 |
Correct |
9 ms |
9820 KB |
Output is correct |
3 |
Correct |
9 ms |
9812 KB |
Output is correct |
4 |
Correct |
10 ms |
9812 KB |
Output is correct |
5 |
Correct |
373 ms |
45064 KB |
Output is correct |
6 |
Correct |
343 ms |
44288 KB |
Output is correct |
7 |
Correct |
482 ms |
41200 KB |
Output is correct |
8 |
Correct |
575 ms |
53600 KB |
Output is correct |
9 |
Correct |
663 ms |
53600 KB |
Output is correct |
10 |
Correct |
596 ms |
53616 KB |
Output is correct |
11 |
Correct |
530 ms |
53536 KB |
Output is correct |
12 |
Correct |
512 ms |
53568 KB |
Output is correct |
13 |
Correct |
531 ms |
53652 KB |
Output is correct |
14 |
Correct |
435 ms |
53436 KB |
Output is correct |
15 |
Correct |
438 ms |
53492 KB |
Output is correct |
16 |
Correct |
479 ms |
53556 KB |
Output is correct |
17 |
Correct |
541 ms |
53508 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
4 ms |
8916 KB |
Output is correct |
2 |
Correct |
5 ms |
8916 KB |
Output is correct |
3 |
Correct |
4 ms |
8940 KB |
Output is correct |
4 |
Correct |
4 ms |
8944 KB |
Output is correct |
5 |
Correct |
8 ms |
9592 KB |
Output is correct |
6 |
Correct |
10 ms |
9600 KB |
Output is correct |
7 |
Correct |
8 ms |
9544 KB |
Output is correct |
8 |
Correct |
9 ms |
9684 KB |
Output is correct |
9 |
Correct |
9 ms |
9596 KB |
Output is correct |
10 |
Correct |
10 ms |
9684 KB |
Output is correct |
11 |
Correct |
9 ms |
9592 KB |
Output is correct |
12 |
Correct |
9 ms |
9708 KB |
Output is correct |
13 |
Correct |
9 ms |
9840 KB |
Output is correct |
14 |
Correct |
9 ms |
9728 KB |
Output is correct |
15 |
Correct |
9 ms |
9684 KB |
Output is correct |
16 |
Correct |
14 ms |
9768 KB |
Output is correct |
17 |
Correct |
9 ms |
9716 KB |
Output is correct |
18 |
Correct |
9 ms |
9724 KB |
Output is correct |
19 |
Correct |
9 ms |
9672 KB |
Output is correct |
20 |
Correct |
9 ms |
9600 KB |
Output is correct |
21 |
Correct |
8 ms |
9592 KB |
Output is correct |
22 |
Correct |
10 ms |
9712 KB |
Output is correct |
23 |
Correct |
9 ms |
9632 KB |
Output is correct |
24 |
Correct |
9 ms |
9596 KB |
Output is correct |
25 |
Correct |
10 ms |
9684 KB |
Output is correct |
26 |
Correct |
8 ms |
9684 KB |
Output is correct |
27 |
Correct |
8 ms |
9684 KB |
Output is correct |
28 |
Correct |
9 ms |
9680 KB |
Output is correct |
29 |
Correct |
8 ms |
9684 KB |
Output is correct |
30 |
Correct |
9 ms |
9556 KB |
Output is correct |
31 |
Correct |
9 ms |
9556 KB |
Output is correct |
32 |
Correct |
10 ms |
9560 KB |
Output is correct |
33 |
Correct |
8 ms |
9856 KB |
Output is correct |
34 |
Correct |
9 ms |
9856 KB |
Output is correct |
35 |
Correct |
9 ms |
9812 KB |
Output is correct |
36 |
Correct |
4 ms |
8944 KB |
Output is correct |
37 |
Correct |
10 ms |
9556 KB |
Output is correct |
38 |
Correct |
11 ms |
9556 KB |
Output is correct |
39 |
Correct |
9 ms |
9496 KB |
Output is correct |
40 |
Correct |
377 ms |
34468 KB |
Output is correct |
41 |
Correct |
457 ms |
32424 KB |
Output is correct |
42 |
Correct |
433 ms |
33848 KB |
Output is correct |
43 |
Correct |
359 ms |
32668 KB |
Output is correct |
44 |
Correct |
338 ms |
31396 KB |
Output is correct |
45 |
Correct |
535 ms |
38276 KB |
Output is correct |
46 |
Correct |
535 ms |
38320 KB |
Output is correct |
47 |
Correct |
560 ms |
38312 KB |
Output is correct |
48 |
Correct |
547 ms |
38304 KB |
Output is correct |
49 |
Correct |
543 ms |
38288 KB |
Output is correct |
50 |
Correct |
617 ms |
45520 KB |
Output is correct |
51 |
Correct |
589 ms |
45960 KB |
Output is correct |
52 |
Correct |
614 ms |
45052 KB |
Output is correct |
53 |
Correct |
636 ms |
38140 KB |
Output is correct |
54 |
Correct |
653 ms |
38124 KB |
Output is correct |
55 |
Correct |
662 ms |
38228 KB |
Output is correct |
56 |
Correct |
536 ms |
37856 KB |
Output is correct |
57 |
Correct |
497 ms |
38032 KB |
Output is correct |
58 |
Correct |
535 ms |
38076 KB |
Output is correct |
59 |
Correct |
491 ms |
38020 KB |
Output is correct |
60 |
Correct |
498 ms |
38596 KB |
Output is correct |
61 |
Correct |
457 ms |
38604 KB |
Output is correct |
62 |
Correct |
509 ms |
38584 KB |
Output is correct |
63 |
Correct |
404 ms |
38120 KB |
Output is correct |
64 |
Correct |
424 ms |
38200 KB |
Output is correct |
65 |
Correct |
428 ms |
38356 KB |
Output is correct |
66 |
Correct |
445 ms |
38360 KB |
Output is correct |
67 |
Correct |
4 ms |
8916 KB |
Output is correct |
68 |
Correct |
9 ms |
9820 KB |
Output is correct |
69 |
Correct |
9 ms |
9812 KB |
Output is correct |
70 |
Correct |
10 ms |
9812 KB |
Output is correct |
71 |
Correct |
373 ms |
45064 KB |
Output is correct |
72 |
Correct |
343 ms |
44288 KB |
Output is correct |
73 |
Correct |
482 ms |
41200 KB |
Output is correct |
74 |
Correct |
575 ms |
53600 KB |
Output is correct |
75 |
Correct |
663 ms |
53600 KB |
Output is correct |
76 |
Correct |
596 ms |
53616 KB |
Output is correct |
77 |
Correct |
530 ms |
53536 KB |
Output is correct |
78 |
Correct |
512 ms |
53568 KB |
Output is correct |
79 |
Correct |
531 ms |
53652 KB |
Output is correct |
80 |
Correct |
435 ms |
53436 KB |
Output is correct |
81 |
Correct |
438 ms |
53492 KB |
Output is correct |
82 |
Correct |
479 ms |
53556 KB |
Output is correct |
83 |
Correct |
541 ms |
53508 KB |
Output is correct |
84 |
Correct |
448 ms |
39156 KB |
Output is correct |
85 |
Correct |
410 ms |
35104 KB |
Output is correct |
86 |
Correct |
357 ms |
32140 KB |
Output is correct |
87 |
Correct |
667 ms |
45668 KB |
Output is correct |
88 |
Correct |
583 ms |
45680 KB |
Output is correct |
89 |
Correct |
686 ms |
45676 KB |
Output is correct |
90 |
Correct |
654 ms |
45684 KB |
Output is correct |
91 |
Correct |
659 ms |
45668 KB |
Output is correct |
92 |
Correct |
626 ms |
50600 KB |
Output is correct |
93 |
Correct |
661 ms |
52224 KB |
Output is correct |
94 |
Correct |
700 ms |
45612 KB |
Output is correct |
95 |
Correct |
719 ms |
45752 KB |
Output is correct |
96 |
Correct |
657 ms |
45600 KB |
Output is correct |
97 |
Correct |
712 ms |
45680 KB |
Output is correct |
98 |
Correct |
544 ms |
45444 KB |
Output is correct |
99 |
Correct |
546 ms |
45352 KB |
Output is correct |
100 |
Correct |
599 ms |
45416 KB |
Output is correct |
101 |
Correct |
598 ms |
45412 KB |
Output is correct |
102 |
Correct |
533 ms |
46004 KB |
Output is correct |
103 |
Correct |
529 ms |
45972 KB |
Output is correct |
104 |
Correct |
542 ms |
45960 KB |
Output is correct |
105 |
Correct |
525 ms |
45764 KB |
Output is correct |
106 |
Correct |
517 ms |
45700 KB |
Output is correct |
107 |
Correct |
523 ms |
45688 KB |
Output is correct |
108 |
Correct |
493 ms |
45628 KB |
Output is correct |