#include <bits/stdc++.h>
using namespace std;
#define int long long
using ll = long long;
#define pb push_back
#define sz(a) (int)a.size()
const int mxN = (int)2e5+10;
const int mxN2 = mxN*320;
const int INF = (int)1e9;
const int mxLg = 18;
using ar = array<ll,2>;
ar seg[mxN2];
vector<ar> edge;
int n, m, q, IND=1;
int jmp[mxLg][mxN];
int lev[mxN], chkpnt[mxN];
vector<int> v[mxN], adj[mxN];
int L[mxN2], R[mxN2], ro[mxN];
void ae(int a, int b){ adj[a].pb(b),adj[b].pb(a); }
int newChild(int p, int v){
int p2 = ++IND;
L[p2] = L[p], R[p2] = R[p];
seg[p2]={seg[p][0]+v,seg[p][1]+1};
return p2;
}
int newPar(int l, int r){
int p = ++IND; L[p] = l, R[p] = r;
seg[p][0] = seg[l][0]+seg[r][0];
seg[p][1] = seg[l][1]+seg[r][1];
return p;
}
int upd(int x, int v, int p, int l=1, int r=INF){
if(!p) return p;
if(l==r) return newChild(p,v);
int mid = (l+r)/2;
if(!L[p]) L[p]=++IND;
if(!R[p]) R[p]=++IND;
if(x<=mid) return newPar(upd(x,v,L[p],l,mid),R[p]);
return newPar(L[p],upd(x,v,R[p],mid+1,r));
}
ar query(int x, int p1, int p2, int p3, int l=1, int r=INF){
if(l==r){
int num = min(seg[p1][1]+seg[p2][1]-2*seg[p3][1], (ll)x/l);
return ar({num*l,num});
}
int mid = (l+r)/2; ar ans = {0,0};
int ltot = seg[L[p1]][0]+seg[L[p2]][0]-2*seg[L[p3]][0];
int lntot = seg[L[p1]][1]+seg[L[p2]][1]-2*seg[L[p3]][1];
if(ltot>=x) ans = query(x,L[p1],L[p2],L[p3],l,mid);
else{
ans = query(x-ltot,R[p1],R[p2],R[p3],mid+1,r);
ans[0]+=ltot, ans[1]+=lntot;
}
return ans;
}
void dfs(int s, int p){
jmp[0][s]=p; lev[s] = lev[p]+1;
for(auto u : adj[s]){
if(u==p) continue;
if(!chkpnt[u]) ro[u]=ro[s];
else ro[u] = upd(chkpnt[u],chkpnt[u],ro[s]);
dfs(u,s);
}
}
int getPath(int x, int k){
for(int i = mxLg-1; i>=0; i--)
if((k>>i)&1) x=jmp[i][x];
return x;
}
int lca(int a, int b){
if(a==b) return a;
if(jmp[0][a]==jmp[0][b]) return jmp[0][a];
if(lev[a]>lev[b]) swap(a,b);
b = getPath(b,lev[b]-lev[a]);
for(int i = mxLg-1; i>=0; i--)
if(jmp[i][a]!=jmp[i][b] and jmp[i][a])
a=jmp[i][a], b=jmp[i][b];
return lca(a,b);
}
int32_t main(){
ios_base::sync_with_stdio(false); cin.tie(0);
cin >> n >> m >> q; ro[1]=1;
int p, c, tot=n+1, a, b;
for(int i = 1; i < n; i++)
cin >> a >> b, edge.pb({a,b});
for(int i = 1; i <= m; i++)
cin >> p >> c, v[p-1].pb(c);
for(int i = 0; i < n-1; i++){
auto [a,b] = edge[i];
if(lev[a]>lev[b]) swap(a,b);
if(sz(v[i])==0) { ae(a,b); continue; }
ae(a,tot);
for(int j = 0; j < sz(v[i]); j++){
chkpnt[tot]=v[i][j];
if(j==sz(v[i])-1) break;
ae(tot,tot+1), tot++;
}
ae(b,tot), tot++;
}
dfs(1,0);
for(int i = 1; i < mxLg; i++)
for(int j = 1; j <= tot; j++)
jmp[i][j] = jmp[i-1][jmp[i-1][j]];
for(int i = 0; i < q; i++){
int s, t, x, y, z; cin >> s >> t >> x >> y;
z = ro[lca(s,t)], s = ro[s], t = ro[t];
int num = seg[s][1]+seg[t][1]-2*seg[z][1];
cout << max(-1ll, x-(num-query(y,s,t,z)[1])) << "\n";
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
9812 KB |
Output is correct |
2 |
Correct |
4 ms |
9812 KB |
Output is correct |
3 |
Correct |
5 ms |
9872 KB |
Output is correct |
4 |
Correct |
5 ms |
9812 KB |
Output is correct |
5 |
Correct |
10 ms |
14784 KB |
Output is correct |
6 |
Correct |
10 ms |
14752 KB |
Output is correct |
7 |
Correct |
9 ms |
13652 KB |
Output is correct |
8 |
Correct |
11 ms |
15132 KB |
Output is correct |
9 |
Correct |
12 ms |
15176 KB |
Output is correct |
10 |
Correct |
12 ms |
15156 KB |
Output is correct |
11 |
Correct |
14 ms |
15140 KB |
Output is correct |
12 |
Correct |
12 ms |
15060 KB |
Output is correct |
13 |
Correct |
13 ms |
15384 KB |
Output is correct |
14 |
Correct |
14 ms |
15332 KB |
Output is correct |
15 |
Correct |
13 ms |
15244 KB |
Output is correct |
16 |
Correct |
13 ms |
15240 KB |
Output is correct |
17 |
Correct |
12 ms |
15136 KB |
Output is correct |
18 |
Correct |
18 ms |
15136 KB |
Output is correct |
19 |
Correct |
15 ms |
15060 KB |
Output is correct |
20 |
Correct |
14 ms |
15096 KB |
Output is correct |
21 |
Correct |
11 ms |
15164 KB |
Output is correct |
22 |
Correct |
17 ms |
15156 KB |
Output is correct |
23 |
Correct |
12 ms |
15212 KB |
Output is correct |
24 |
Correct |
11 ms |
15212 KB |
Output is correct |
25 |
Correct |
11 ms |
15228 KB |
Output is correct |
26 |
Correct |
10 ms |
15060 KB |
Output is correct |
27 |
Correct |
10 ms |
15060 KB |
Output is correct |
28 |
Correct |
11 ms |
15060 KB |
Output is correct |
29 |
Correct |
15 ms |
15060 KB |
Output is correct |
30 |
Correct |
9 ms |
12708 KB |
Output is correct |
31 |
Correct |
9 ms |
12788 KB |
Output is correct |
32 |
Correct |
9 ms |
12756 KB |
Output is correct |
33 |
Correct |
13 ms |
15412 KB |
Output is correct |
34 |
Correct |
12 ms |
15408 KB |
Output is correct |
35 |
Correct |
12 ms |
15316 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
9812 KB |
Output is correct |
2 |
Correct |
9 ms |
12792 KB |
Output is correct |
3 |
Correct |
9 ms |
12708 KB |
Output is correct |
4 |
Correct |
9 ms |
12756 KB |
Output is correct |
5 |
Correct |
255 ms |
138136 KB |
Output is correct |
6 |
Correct |
314 ms |
122176 KB |
Output is correct |
7 |
Correct |
268 ms |
106024 KB |
Output is correct |
8 |
Correct |
234 ms |
103128 KB |
Output is correct |
9 |
Correct |
221 ms |
109272 KB |
Output is correct |
10 |
Correct |
329 ms |
150220 KB |
Output is correct |
11 |
Correct |
345 ms |
147092 KB |
Output is correct |
12 |
Correct |
352 ms |
150152 KB |
Output is correct |
13 |
Correct |
345 ms |
150300 KB |
Output is correct |
14 |
Correct |
399 ms |
150180 KB |
Output is correct |
15 |
Correct |
568 ms |
161284 KB |
Output is correct |
16 |
Correct |
526 ms |
162120 KB |
Output is correct |
17 |
Correct |
527 ms |
160712 KB |
Output is correct |
18 |
Correct |
443 ms |
150064 KB |
Output is correct |
19 |
Correct |
446 ms |
149900 KB |
Output is correct |
20 |
Correct |
429 ms |
150048 KB |
Output is correct |
21 |
Correct |
280 ms |
150388 KB |
Output is correct |
22 |
Correct |
295 ms |
150316 KB |
Output is correct |
23 |
Correct |
271 ms |
150352 KB |
Output is correct |
24 |
Correct |
268 ms |
150372 KB |
Output is correct |
25 |
Correct |
282 ms |
152928 KB |
Output is correct |
26 |
Correct |
293 ms |
153044 KB |
Output is correct |
27 |
Correct |
265 ms |
152944 KB |
Output is correct |
28 |
Correct |
213 ms |
147088 KB |
Output is correct |
29 |
Correct |
222 ms |
150128 KB |
Output is correct |
30 |
Correct |
247 ms |
150180 KB |
Output is correct |
31 |
Correct |
239 ms |
150248 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
9812 KB |
Output is correct |
2 |
Correct |
12 ms |
15316 KB |
Output is correct |
3 |
Correct |
15 ms |
15320 KB |
Output is correct |
4 |
Correct |
13 ms |
15300 KB |
Output is correct |
5 |
Correct |
519 ms |
174328 KB |
Output is correct |
6 |
Correct |
526 ms |
146032 KB |
Output is correct |
7 |
Correct |
713 ms |
219272 KB |
Output is correct |
8 |
Correct |
967 ms |
246240 KB |
Output is correct |
9 |
Correct |
966 ms |
246472 KB |
Output is correct |
10 |
Correct |
965 ms |
246460 KB |
Output is correct |
11 |
Correct |
769 ms |
246016 KB |
Output is correct |
12 |
Correct |
808 ms |
245968 KB |
Output is correct |
13 |
Correct |
827 ms |
245920 KB |
Output is correct |
14 |
Correct |
472 ms |
246404 KB |
Output is correct |
15 |
Correct |
419 ms |
246404 KB |
Output is correct |
16 |
Correct |
566 ms |
246412 KB |
Output is correct |
17 |
Correct |
543 ms |
246372 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
9812 KB |
Output is correct |
2 |
Correct |
4 ms |
9812 KB |
Output is correct |
3 |
Correct |
5 ms |
9872 KB |
Output is correct |
4 |
Correct |
5 ms |
9812 KB |
Output is correct |
5 |
Correct |
10 ms |
14784 KB |
Output is correct |
6 |
Correct |
10 ms |
14752 KB |
Output is correct |
7 |
Correct |
9 ms |
13652 KB |
Output is correct |
8 |
Correct |
11 ms |
15132 KB |
Output is correct |
9 |
Correct |
12 ms |
15176 KB |
Output is correct |
10 |
Correct |
12 ms |
15156 KB |
Output is correct |
11 |
Correct |
14 ms |
15140 KB |
Output is correct |
12 |
Correct |
12 ms |
15060 KB |
Output is correct |
13 |
Correct |
13 ms |
15384 KB |
Output is correct |
14 |
Correct |
14 ms |
15332 KB |
Output is correct |
15 |
Correct |
13 ms |
15244 KB |
Output is correct |
16 |
Correct |
13 ms |
15240 KB |
Output is correct |
17 |
Correct |
12 ms |
15136 KB |
Output is correct |
18 |
Correct |
18 ms |
15136 KB |
Output is correct |
19 |
Correct |
15 ms |
15060 KB |
Output is correct |
20 |
Correct |
14 ms |
15096 KB |
Output is correct |
21 |
Correct |
11 ms |
15164 KB |
Output is correct |
22 |
Correct |
17 ms |
15156 KB |
Output is correct |
23 |
Correct |
12 ms |
15212 KB |
Output is correct |
24 |
Correct |
11 ms |
15212 KB |
Output is correct |
25 |
Correct |
11 ms |
15228 KB |
Output is correct |
26 |
Correct |
10 ms |
15060 KB |
Output is correct |
27 |
Correct |
10 ms |
15060 KB |
Output is correct |
28 |
Correct |
11 ms |
15060 KB |
Output is correct |
29 |
Correct |
15 ms |
15060 KB |
Output is correct |
30 |
Correct |
9 ms |
12708 KB |
Output is correct |
31 |
Correct |
9 ms |
12788 KB |
Output is correct |
32 |
Correct |
9 ms |
12756 KB |
Output is correct |
33 |
Correct |
13 ms |
15412 KB |
Output is correct |
34 |
Correct |
12 ms |
15408 KB |
Output is correct |
35 |
Correct |
12 ms |
15316 KB |
Output is correct |
36 |
Correct |
5 ms |
9812 KB |
Output is correct |
37 |
Correct |
9 ms |
12792 KB |
Output is correct |
38 |
Correct |
9 ms |
12708 KB |
Output is correct |
39 |
Correct |
9 ms |
12756 KB |
Output is correct |
40 |
Correct |
255 ms |
138136 KB |
Output is correct |
41 |
Correct |
314 ms |
122176 KB |
Output is correct |
42 |
Correct |
268 ms |
106024 KB |
Output is correct |
43 |
Correct |
234 ms |
103128 KB |
Output is correct |
44 |
Correct |
221 ms |
109272 KB |
Output is correct |
45 |
Correct |
329 ms |
150220 KB |
Output is correct |
46 |
Correct |
345 ms |
147092 KB |
Output is correct |
47 |
Correct |
352 ms |
150152 KB |
Output is correct |
48 |
Correct |
345 ms |
150300 KB |
Output is correct |
49 |
Correct |
399 ms |
150180 KB |
Output is correct |
50 |
Correct |
568 ms |
161284 KB |
Output is correct |
51 |
Correct |
526 ms |
162120 KB |
Output is correct |
52 |
Correct |
527 ms |
160712 KB |
Output is correct |
53 |
Correct |
443 ms |
150064 KB |
Output is correct |
54 |
Correct |
446 ms |
149900 KB |
Output is correct |
55 |
Correct |
429 ms |
150048 KB |
Output is correct |
56 |
Correct |
280 ms |
150388 KB |
Output is correct |
57 |
Correct |
295 ms |
150316 KB |
Output is correct |
58 |
Correct |
271 ms |
150352 KB |
Output is correct |
59 |
Correct |
268 ms |
150372 KB |
Output is correct |
60 |
Correct |
282 ms |
152928 KB |
Output is correct |
61 |
Correct |
293 ms |
153044 KB |
Output is correct |
62 |
Correct |
265 ms |
152944 KB |
Output is correct |
63 |
Correct |
213 ms |
147088 KB |
Output is correct |
64 |
Correct |
222 ms |
150128 KB |
Output is correct |
65 |
Correct |
247 ms |
150180 KB |
Output is correct |
66 |
Correct |
239 ms |
150248 KB |
Output is correct |
67 |
Correct |
5 ms |
9812 KB |
Output is correct |
68 |
Correct |
12 ms |
15316 KB |
Output is correct |
69 |
Correct |
15 ms |
15320 KB |
Output is correct |
70 |
Correct |
13 ms |
15300 KB |
Output is correct |
71 |
Correct |
519 ms |
174328 KB |
Output is correct |
72 |
Correct |
526 ms |
146032 KB |
Output is correct |
73 |
Correct |
713 ms |
219272 KB |
Output is correct |
74 |
Correct |
967 ms |
246240 KB |
Output is correct |
75 |
Correct |
966 ms |
246472 KB |
Output is correct |
76 |
Correct |
965 ms |
246460 KB |
Output is correct |
77 |
Correct |
769 ms |
246016 KB |
Output is correct |
78 |
Correct |
808 ms |
245968 KB |
Output is correct |
79 |
Correct |
827 ms |
245920 KB |
Output is correct |
80 |
Correct |
472 ms |
246404 KB |
Output is correct |
81 |
Correct |
419 ms |
246404 KB |
Output is correct |
82 |
Correct |
566 ms |
246412 KB |
Output is correct |
83 |
Correct |
543 ms |
246372 KB |
Output is correct |
84 |
Correct |
423 ms |
217904 KB |
Output is correct |
85 |
Correct |
425 ms |
194880 KB |
Output is correct |
86 |
Correct |
336 ms |
143692 KB |
Output is correct |
87 |
Correct |
573 ms |
234296 KB |
Output is correct |
88 |
Correct |
592 ms |
234240 KB |
Output is correct |
89 |
Correct |
571 ms |
234280 KB |
Output is correct |
90 |
Correct |
576 ms |
234432 KB |
Output is correct |
91 |
Correct |
645 ms |
234436 KB |
Output is correct |
92 |
Correct |
1057 ms |
242156 KB |
Output is correct |
93 |
Correct |
1073 ms |
244864 KB |
Output is correct |
94 |
Correct |
842 ms |
234672 KB |
Output is correct |
95 |
Correct |
817 ms |
234700 KB |
Output is correct |
96 |
Correct |
824 ms |
234600 KB |
Output is correct |
97 |
Correct |
845 ms |
234596 KB |
Output is correct |
98 |
Correct |
477 ms |
234900 KB |
Output is correct |
99 |
Correct |
482 ms |
234972 KB |
Output is correct |
100 |
Correct |
455 ms |
234884 KB |
Output is correct |
101 |
Correct |
472 ms |
234892 KB |
Output is correct |
102 |
Correct |
561 ms |
237572 KB |
Output is correct |
103 |
Correct |
576 ms |
237544 KB |
Output is correct |
104 |
Correct |
604 ms |
237596 KB |
Output is correct |
105 |
Correct |
365 ms |
234788 KB |
Output is correct |
106 |
Correct |
356 ms |
234808 KB |
Output is correct |
107 |
Correct |
378 ms |
234736 KB |
Output is correct |
108 |
Correct |
399 ms |
234928 KB |
Output is correct |