#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <class S, S (*f)(S, S), S e>
struct PST {
struct T {
T *l, *r; S s;
T() : s() {l = r = nullptr;}
T(const S &v) : s(v) {l = r = nullptr;}
T(T *t) : l(t->l), r(t->r), s(t->s) {}
T(T *a, T *b) : l(a), r(b), s() {
if (l) s = f(s, l->s);
if (r) s = f(s, r->s);
}
};
int n;
vector<T*> rts;
PST(int m) : PST(vector<S>(m, e)) {
}
PST(const vector<S> &a) : n(a.size()) {
function<T*(int, int)> bld = [&](int l, int r) {
if (l + 1 == r) {
return new T(a[l]);
}
int m = (l + r) / 2;
return new T(bld(l, m), bld(m, r));
};
rts.push_back(bld(0, n));
}
T* set(T *i, int l, int r, int p, const S &v) {
if (l + 1 == r) {
return new T(v);
}
int m = (l + r) / 2;
if (p < m) {
return new T(set(i->l, l, m, p, v), i->r);
} else {
return new T(i->l, set(i->r, m, r, p, v));
}
}
T* upd(T *i, int l, int r, int p, const S &v) {
if (l + 1 == r) {
return new T(f(i->s, v));
}
int m = (l + r) / 2;
if (p < m) {
return new T(upd(i->l, l, m, p, v), i->r);
} else {
return new T(i->l, upd(i->r, m, r, p, v));
}
}
S qry(T *i, int l, int r, int L, int R) {
if (R <= l || r <= L) {
return e;
}
if (L <= l && r <= R) {
return i->s;
}
int m = (l + r) / 2;
return f(qry(i->l, l, m, L, R), qry(i->r, m, r, L, R));
}
int lst() {
return rts.size() - 1;
}
int cpy(int k) {
rts.push_back(new T(rts[k]));
return rts.size() - 1;
}
void set(int k, int i, const S &v) {
rts[k] = set(rts[k], 0, n, i, v);
}
void upd(int k, int i, const S &v) {
rts[k] = upd(rts[k], 0, n, i, v);
}
S qry(int k, int l, int r) {
return qry(rts[k], 0, n, l, r);
}
};
ll F(ll x, ll y) {
return x + y;
}
struct HLD {
int n, timer;
vector<int> sz, dep, par, top, pos;
vector<vector<int>> adj;
HLD(int n) : n(n) {
sz.resize(n);
dep.resize(n);
top.resize(n);
pos.resize(n);
adj.resize(n);
par.resize(n);
}
void add_edge(int x, int y) {
adj[x].push_back(y);
adj[y].push_back(x);
}
void init(int x) {
sz[x] = 1;
for (int &y : adj[x]) {
dep[y] = dep[x] + 1;
adj[y].erase(find(adj[y].begin(), adj[y].end(), par[y] = x));
init(y);
sz[x] += sz[y];
if (sz[y] > sz[adj[x][0]]) {
swap(y, adj[x][0]);
}
}
}
void dfs(int x) {
pos[x] = timer++;
for (int y : adj[x]) {
top[y] = y == adj[x][0] ? top[x] : y;
dfs(y);
}
}
void build() {
par[0] = -1; init(0);
timer = 0; dfs(0);
}
int lca(int x, int y) {
for (; top[x] != top[y]; x = par[top[x]]) {
if (dep[top[x]] < dep[top[y]]) {
swap(x, y);
}
}
return dep[x] < dep[y] ? x : y;
}
template <class T>
void path(int x, int y, bool e, T f) {
for (; top[x] != top[y]; x = par[top[x]]) {
if (dep[top[x]] < dep[top[y]]) {
swap(x, y);
}
f(pos[top[x]], pos[x] + 1);
}
if (dep[x] > dep[y]) {
swap(x, y);
}
f(pos[x] + e, pos[y] + 1);
}
};
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int N, M, Q;
cin >> N >> M >> Q;
vector<pair<int, int>> edges(N - 1);
vector<vector<int>> adj(N);
for (int i = 0; i < N - 1; i++) {
int x, y;
cin >> x >> y;
x--, y--;
edges[i] = {x, y};
adj[x].push_back(i);
adj[y].push_back(i);
}
vector<pair<int, int>> ch(M);
for (int i = 0; i < M; i++) {
int p, c;
cin >> p >> c;
ch[i] = {c, p - 1};
}
sort(ch.begin(), ch.end());
vector<int> t(N - 1);
{
auto dfs = [&](auto dfs, int x, int p) -> void {
for (int z : adj[x]) {
auto [u, v] = edges[z];
int y = x ^ u ^ v;
if (y != p) {
t[z] = y;
dfs(dfs, y, x);
}
}
};
dfs(dfs, 0, -1);
}
HLD hld(N);
for (int i = 0; i < N; i++) {
for (int &j : adj[i]) {
auto [x, y] = edges[j];
j = i ^ x ^ y;
if (j < i) {
hld.add_edge(i, j);
}
}
}
hld.build();
PST<ll, F, 0> q(N);
for (int i = 0; i < M; i++) {
auto [c, p] = ch[i];
q.upd(q.cpy(q.lst()), hld.pos[t[p]], c);
}
auto get = [&](int x, int y, int z) -> ll {
ll s = 0;
hld.path(x, y, 1, [&](int l, int r) {
s += q.qry(z, l, r);
});
return s;
};
vector<int> S(Q), T(Q), X(Q), a(Q);
vector<ll> Y(Q);
for (int i = 0; i < Q; i++) {
cin >> S[i] >> T[i] >> X[i] >> Y[i];
S[i]--, T[i]--;
int lo = 0, hi = M;
while (lo < hi) {
int mi = (lo + hi + 1) / 2;
if (get(S[i], T[i], mi) <= Y[i]) {
lo = mi;
} else {
hi = mi - 1;
}
}
a[i] = lo;
}
vector<ll> ans(Q);
vector<vector<int>> f(M + 1);
for (int i = 0; i < Q; i++) {
f[a[i]].push_back(i);
}
q = PST<ll, F, 0>(N);
for (int i = M; i >= 0; i--) {
if (i < M) {
auto [c, p] = ch[i];
q.upd(q.cpy(q.lst()), hld.pos[t[p]], 1);
}
for (int j : f[i]) {
ans[j] = max(-1LL, X[j] - get(S[j], T[j], q.lst()));
}
}
for (int i = 0; i < Q; i++) {
cout << ans[i] << "\n";
}
return 6/22;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
600 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
8 ms |
2416 KB |
Output is correct |
6 |
Correct |
11 ms |
2392 KB |
Output is correct |
7 |
Correct |
9 ms |
1884 KB |
Output is correct |
8 |
Correct |
13 ms |
2652 KB |
Output is correct |
9 |
Correct |
12 ms |
2652 KB |
Output is correct |
10 |
Correct |
12 ms |
2652 KB |
Output is correct |
11 |
Correct |
12 ms |
2648 KB |
Output is correct |
12 |
Correct |
13 ms |
2792 KB |
Output is correct |
13 |
Correct |
7 ms |
2908 KB |
Output is correct |
14 |
Correct |
8 ms |
2652 KB |
Output is correct |
15 |
Correct |
9 ms |
2652 KB |
Output is correct |
16 |
Correct |
9 ms |
2812 KB |
Output is correct |
17 |
Correct |
10 ms |
2652 KB |
Output is correct |
18 |
Correct |
9 ms |
2652 KB |
Output is correct |
19 |
Correct |
8 ms |
2652 KB |
Output is correct |
20 |
Correct |
8 ms |
2652 KB |
Output is correct |
21 |
Correct |
8 ms |
2652 KB |
Output is correct |
22 |
Correct |
8 ms |
2652 KB |
Output is correct |
23 |
Correct |
11 ms |
2904 KB |
Output is correct |
24 |
Correct |
11 ms |
2652 KB |
Output is correct |
25 |
Correct |
11 ms |
2652 KB |
Output is correct |
26 |
Correct |
9 ms |
2652 KB |
Output is correct |
27 |
Correct |
7 ms |
2652 KB |
Output is correct |
28 |
Correct |
9 ms |
2648 KB |
Output is correct |
29 |
Correct |
6 ms |
2652 KB |
Output is correct |
30 |
Correct |
14 ms |
2648 KB |
Output is correct |
31 |
Correct |
11 ms |
2652 KB |
Output is correct |
32 |
Correct |
13 ms |
2656 KB |
Output is correct |
33 |
Correct |
7 ms |
2908 KB |
Output is correct |
34 |
Correct |
7 ms |
2904 KB |
Output is correct |
35 |
Correct |
7 ms |
2908 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
11 ms |
2780 KB |
Output is correct |
3 |
Correct |
12 ms |
2652 KB |
Output is correct |
4 |
Correct |
11 ms |
2792 KB |
Output is correct |
5 |
Correct |
1717 ms |
138348 KB |
Output is correct |
6 |
Correct |
2169 ms |
118472 KB |
Output is correct |
7 |
Correct |
2001 ms |
105172 KB |
Output is correct |
8 |
Correct |
1533 ms |
101480 KB |
Output is correct |
9 |
Correct |
1482 ms |
107724 KB |
Output is correct |
10 |
Correct |
2787 ms |
152556 KB |
Output is correct |
11 |
Correct |
2814 ms |
152584 KB |
Output is correct |
12 |
Correct |
2817 ms |
152848 KB |
Output is correct |
13 |
Correct |
2992 ms |
152996 KB |
Output is correct |
14 |
Correct |
2804 ms |
152580 KB |
Output is correct |
15 |
Correct |
1505 ms |
160580 KB |
Output is correct |
16 |
Correct |
1429 ms |
161128 KB |
Output is correct |
17 |
Correct |
1586 ms |
160184 KB |
Output is correct |
18 |
Correct |
2622 ms |
152876 KB |
Output is correct |
19 |
Correct |
2621 ms |
152740 KB |
Output is correct |
20 |
Correct |
2689 ms |
152768 KB |
Output is correct |
21 |
Correct |
1209 ms |
153656 KB |
Output is correct |
22 |
Correct |
975 ms |
153936 KB |
Output is correct |
23 |
Correct |
1385 ms |
153640 KB |
Output is correct |
24 |
Correct |
1036 ms |
153652 KB |
Output is correct |
25 |
Correct |
1720 ms |
154024 KB |
Output is correct |
26 |
Correct |
2025 ms |
150988 KB |
Output is correct |
27 |
Correct |
1805 ms |
154148 KB |
Output is correct |
28 |
Correct |
1201 ms |
152088 KB |
Output is correct |
29 |
Correct |
982 ms |
151928 KB |
Output is correct |
30 |
Correct |
1731 ms |
152280 KB |
Output is correct |
31 |
Correct |
1971 ms |
152108 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
10 ms |
2908 KB |
Output is correct |
3 |
Correct |
7 ms |
2936 KB |
Output is correct |
4 |
Correct |
7 ms |
2908 KB |
Output is correct |
5 |
Correct |
884 ms |
114920 KB |
Output is correct |
6 |
Correct |
879 ms |
97576 KB |
Output is correct |
7 |
Correct |
1351 ms |
130788 KB |
Output is correct |
8 |
Correct |
1767 ms |
161380 KB |
Output is correct |
9 |
Correct |
1775 ms |
161196 KB |
Output is correct |
10 |
Correct |
1783 ms |
161200 KB |
Output is correct |
11 |
Correct |
1424 ms |
162096 KB |
Output is correct |
12 |
Correct |
1277 ms |
162200 KB |
Output is correct |
13 |
Correct |
1266 ms |
159164 KB |
Output is correct |
14 |
Correct |
841 ms |
160372 KB |
Output is correct |
15 |
Correct |
724 ms |
160052 KB |
Output is correct |
16 |
Correct |
990 ms |
160428 KB |
Output is correct |
17 |
Correct |
1035 ms |
160432 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
600 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
8 ms |
2416 KB |
Output is correct |
6 |
Correct |
11 ms |
2392 KB |
Output is correct |
7 |
Correct |
9 ms |
1884 KB |
Output is correct |
8 |
Correct |
13 ms |
2652 KB |
Output is correct |
9 |
Correct |
12 ms |
2652 KB |
Output is correct |
10 |
Correct |
12 ms |
2652 KB |
Output is correct |
11 |
Correct |
12 ms |
2648 KB |
Output is correct |
12 |
Correct |
13 ms |
2792 KB |
Output is correct |
13 |
Correct |
7 ms |
2908 KB |
Output is correct |
14 |
Correct |
8 ms |
2652 KB |
Output is correct |
15 |
Correct |
9 ms |
2652 KB |
Output is correct |
16 |
Correct |
9 ms |
2812 KB |
Output is correct |
17 |
Correct |
10 ms |
2652 KB |
Output is correct |
18 |
Correct |
9 ms |
2652 KB |
Output is correct |
19 |
Correct |
8 ms |
2652 KB |
Output is correct |
20 |
Correct |
8 ms |
2652 KB |
Output is correct |
21 |
Correct |
8 ms |
2652 KB |
Output is correct |
22 |
Correct |
8 ms |
2652 KB |
Output is correct |
23 |
Correct |
11 ms |
2904 KB |
Output is correct |
24 |
Correct |
11 ms |
2652 KB |
Output is correct |
25 |
Correct |
11 ms |
2652 KB |
Output is correct |
26 |
Correct |
9 ms |
2652 KB |
Output is correct |
27 |
Correct |
7 ms |
2652 KB |
Output is correct |
28 |
Correct |
9 ms |
2648 KB |
Output is correct |
29 |
Correct |
6 ms |
2652 KB |
Output is correct |
30 |
Correct |
14 ms |
2648 KB |
Output is correct |
31 |
Correct |
11 ms |
2652 KB |
Output is correct |
32 |
Correct |
13 ms |
2656 KB |
Output is correct |
33 |
Correct |
7 ms |
2908 KB |
Output is correct |
34 |
Correct |
7 ms |
2904 KB |
Output is correct |
35 |
Correct |
7 ms |
2908 KB |
Output is correct |
36 |
Correct |
0 ms |
344 KB |
Output is correct |
37 |
Correct |
11 ms |
2780 KB |
Output is correct |
38 |
Correct |
12 ms |
2652 KB |
Output is correct |
39 |
Correct |
11 ms |
2792 KB |
Output is correct |
40 |
Correct |
1717 ms |
138348 KB |
Output is correct |
41 |
Correct |
2169 ms |
118472 KB |
Output is correct |
42 |
Correct |
2001 ms |
105172 KB |
Output is correct |
43 |
Correct |
1533 ms |
101480 KB |
Output is correct |
44 |
Correct |
1482 ms |
107724 KB |
Output is correct |
45 |
Correct |
2787 ms |
152556 KB |
Output is correct |
46 |
Correct |
2814 ms |
152584 KB |
Output is correct |
47 |
Correct |
2817 ms |
152848 KB |
Output is correct |
48 |
Correct |
2992 ms |
152996 KB |
Output is correct |
49 |
Correct |
2804 ms |
152580 KB |
Output is correct |
50 |
Correct |
1505 ms |
160580 KB |
Output is correct |
51 |
Correct |
1429 ms |
161128 KB |
Output is correct |
52 |
Correct |
1586 ms |
160184 KB |
Output is correct |
53 |
Correct |
2622 ms |
152876 KB |
Output is correct |
54 |
Correct |
2621 ms |
152740 KB |
Output is correct |
55 |
Correct |
2689 ms |
152768 KB |
Output is correct |
56 |
Correct |
1209 ms |
153656 KB |
Output is correct |
57 |
Correct |
975 ms |
153936 KB |
Output is correct |
58 |
Correct |
1385 ms |
153640 KB |
Output is correct |
59 |
Correct |
1036 ms |
153652 KB |
Output is correct |
60 |
Correct |
1720 ms |
154024 KB |
Output is correct |
61 |
Correct |
2025 ms |
150988 KB |
Output is correct |
62 |
Correct |
1805 ms |
154148 KB |
Output is correct |
63 |
Correct |
1201 ms |
152088 KB |
Output is correct |
64 |
Correct |
982 ms |
151928 KB |
Output is correct |
65 |
Correct |
1731 ms |
152280 KB |
Output is correct |
66 |
Correct |
1971 ms |
152108 KB |
Output is correct |
67 |
Correct |
0 ms |
344 KB |
Output is correct |
68 |
Correct |
10 ms |
2908 KB |
Output is correct |
69 |
Correct |
7 ms |
2936 KB |
Output is correct |
70 |
Correct |
7 ms |
2908 KB |
Output is correct |
71 |
Correct |
884 ms |
114920 KB |
Output is correct |
72 |
Correct |
879 ms |
97576 KB |
Output is correct |
73 |
Correct |
1351 ms |
130788 KB |
Output is correct |
74 |
Correct |
1767 ms |
161380 KB |
Output is correct |
75 |
Correct |
1775 ms |
161196 KB |
Output is correct |
76 |
Correct |
1783 ms |
161200 KB |
Output is correct |
77 |
Correct |
1424 ms |
162096 KB |
Output is correct |
78 |
Correct |
1277 ms |
162200 KB |
Output is correct |
79 |
Correct |
1266 ms |
159164 KB |
Output is correct |
80 |
Correct |
841 ms |
160372 KB |
Output is correct |
81 |
Correct |
724 ms |
160052 KB |
Output is correct |
82 |
Correct |
990 ms |
160428 KB |
Output is correct |
83 |
Correct |
1035 ms |
160432 KB |
Output is correct |
84 |
Correct |
2024 ms |
136852 KB |
Output is correct |
85 |
Correct |
2250 ms |
115860 KB |
Output is correct |
86 |
Correct |
1580 ms |
85912 KB |
Output is correct |
87 |
Correct |
3543 ms |
152576 KB |
Output is correct |
88 |
Correct |
3585 ms |
152612 KB |
Output is correct |
89 |
Correct |
3637 ms |
152580 KB |
Output is correct |
90 |
Correct |
4059 ms |
152708 KB |
Output is correct |
91 |
Correct |
4070 ms |
152580 KB |
Output is correct |
92 |
Correct |
2047 ms |
158396 KB |
Output is correct |
93 |
Correct |
1938 ms |
159920 KB |
Output is correct |
94 |
Correct |
3416 ms |
152788 KB |
Output is correct |
95 |
Correct |
3496 ms |
152940 KB |
Output is correct |
96 |
Correct |
3299 ms |
152792 KB |
Output is correct |
97 |
Correct |
3260 ms |
152760 KB |
Output is correct |
98 |
Correct |
1768 ms |
153800 KB |
Output is correct |
99 |
Correct |
1816 ms |
153948 KB |
Output is correct |
100 |
Correct |
1867 ms |
153896 KB |
Output is correct |
101 |
Correct |
1890 ms |
153644 KB |
Output is correct |
102 |
Correct |
2350 ms |
150804 KB |
Output is correct |
103 |
Correct |
2475 ms |
154328 KB |
Output is correct |
104 |
Correct |
2537 ms |
150980 KB |
Output is correct |
105 |
Correct |
1316 ms |
151984 KB |
Output is correct |
106 |
Correct |
1519 ms |
152104 KB |
Output is correct |
107 |
Correct |
1740 ms |
151972 KB |
Output is correct |
108 |
Correct |
1717 ms |
152052 KB |
Output is correct |