#include<bits/stdc++.h>
//#include <grader.h>
#define pii pair<int, int>
#define pll pair<long long, long long>
#define ll long long
#define ld long double
#define st first
#define nd second
#define pb push_back
#define INF INT_MAX
using namespace std;
const int N = 1e5 + 10;
const int L = log2(N)+1;
struct node{
ll val, cnt;
ll lc, rc;
}seg[20*N];
vector<pll> adj[N];
vector<ll> cost[N];
map<ll, ll> mp, rv;
ll up[N][L], lvl[N], cnt, root[N];
void update(ll &cur, ll l, ll r, ll x, ll val) {
cnt++;
seg[cnt] = seg[cur];
cur = cnt;
if (l==r) {
seg[cur].val = val;
seg[cur].cnt = 1;
return;
}
int mid = (l+r)/2;
if (x <= mid) update(seg[cur].lc, l, mid, x, val);
else update(seg[cur].rc, mid+1, r, x, val);
seg[cur].val = seg[seg[cur].rc].val + seg[seg[cur].lc].val;
seg[cur].cnt = seg[seg[cur].rc].cnt + seg[seg[cur].lc].cnt;
}
ll query(ll curu, ll curv, ll curc, ll l, ll r, ll x, ll ans) {
if (l==r) {
if (x >= seg[curu].val + seg[curv].val - 2*seg[curc].val)
return ans + seg[curu].cnt + seg[curv].cnt - 2*seg[curc].cnt;
else
return ans;
}
ll mid = (l+r)/2;
ll nxt = seg[seg[curu].lc].val + seg[seg[curv].lc].val - 2*seg[seg[curc].lc].val;
ll lft = seg[seg[curu].lc].cnt + seg[seg[curv].lc].cnt - 2*seg[seg[curc].lc].cnt;
if (nxt > x) return query(seg[curu].lc, seg[curv].lc, seg[curc].lc, l, mid, x, ans);
else return query(seg[curu].rc, seg[curv].rc, seg[curc].rc, mid+1, r, x-nxt, ans+lft);
}
void dfs(ll a, ll prt) {
up[a][0] = prt; lvl[a] = lvl[prt]+1;
for (int i = 1; i < L; ++i) up[a][i] = up[up[a][i-1]][i-1];
for (auto [b, idx] : adj[a]) if (b != prt) dfs(b, a);
}
ll lca(ll a, ll b) {
if (lvl[a] < lvl[b]) swap(a, b);
ll j = lvl[a]-lvl[b];
for (int i = 0; i < L; ++i) if (j&(1<<i)) a = up[a][i];
if (a==b) return a;
for (int i = L-1; i >= 0; --i) if (up[a][i] != up[b][i]) a = up[a][i], b = up[b][i];
return up[a][0];
}
void build(int a, int prt) {
for (auto [b, i] : adj[a]) {
if (b == prt) continue;
root[b] = root[a];
for (auto c : cost[i]) update(root[b], 1, 100000, mp[c], rv[c]);
build(b, a);
}
}
void solve() {
int n, m, q; cin >> n >> m >> q;
for (int i = 1; i < n; ++i) {
ll a, b; cin >> a >> b;
adj[a].pb({b, i});
adj[b].pb({a, i});
}
vector<pll> v; ll tmp = 0;
for (int i = 1; i <= m; ++i) {
ll p, c; cin >> p >> c;
cost[p].pb(i); v.pb({c, i});
}
sort(v.begin(), v.end());
for (auto i : v) mp[i.nd] = ++tmp, rv[i.nd] = i.st;
dfs(1, 0);
build(1, 0);
while (q--) {
ll s, t, x, y; cin >> s >> t >> x >> y;
ll c = lca(s, t);
ll rmn = query(root[s], root[t], root[c], 1, 100000, 1e18, 0) - query(root[s], root[t], root[c], 1, 100000, y, 0);
if (rmn > x) cout << -1 << '\n';
else cout << x-rmn << '\n';
}
}
int main() {
ios_base::sync_with_stdio(0); cin.tie(NULL);
int t = 1;
// cin >> t;
while (t--) {
solve();
}
return 0;
}
Compilation message
currencies.cpp: In function 'void dfs(long long int, long long int)':
currencies.cpp:60:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
60 | for (auto [b, idx] : adj[a]) if (b != prt) dfs(b, a);
| ^
currencies.cpp: In function 'void build(int, int)':
currencies.cpp:73:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
73 | for (auto [b, i] : adj[a]) {
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4948 KB |
Output is correct |
2 |
Correct |
3 ms |
4948 KB |
Output is correct |
3 |
Correct |
3 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
4948 KB |
Output is correct |
5 |
Correct |
8 ms |
6848 KB |
Output is correct |
6 |
Correct |
7 ms |
6740 KB |
Output is correct |
7 |
Correct |
6 ms |
6476 KB |
Output is correct |
8 |
Correct |
7 ms |
6868 KB |
Output is correct |
9 |
Correct |
8 ms |
6940 KB |
Output is correct |
10 |
Correct |
9 ms |
6868 KB |
Output is correct |
11 |
Correct |
10 ms |
6888 KB |
Output is correct |
12 |
Correct |
8 ms |
6868 KB |
Output is correct |
13 |
Correct |
8 ms |
7124 KB |
Output is correct |
14 |
Correct |
9 ms |
7124 KB |
Output is correct |
15 |
Correct |
9 ms |
6964 KB |
Output is correct |
16 |
Correct |
12 ms |
6964 KB |
Output is correct |
17 |
Correct |
8 ms |
7048 KB |
Output is correct |
18 |
Correct |
8 ms |
7060 KB |
Output is correct |
19 |
Correct |
10 ms |
6868 KB |
Output is correct |
20 |
Correct |
8 ms |
6836 KB |
Output is correct |
21 |
Correct |
9 ms |
6860 KB |
Output is correct |
22 |
Correct |
8 ms |
6840 KB |
Output is correct |
23 |
Correct |
8 ms |
6880 KB |
Output is correct |
24 |
Correct |
10 ms |
6968 KB |
Output is correct |
25 |
Correct |
8 ms |
6868 KB |
Output is correct |
26 |
Correct |
8 ms |
6972 KB |
Output is correct |
27 |
Correct |
8 ms |
6964 KB |
Output is correct |
28 |
Correct |
8 ms |
6956 KB |
Output is correct |
29 |
Correct |
10 ms |
6868 KB |
Output is correct |
30 |
Correct |
7 ms |
6872 KB |
Output is correct |
31 |
Correct |
7 ms |
6868 KB |
Output is correct |
32 |
Correct |
10 ms |
6868 KB |
Output is correct |
33 |
Correct |
8 ms |
7272 KB |
Output is correct |
34 |
Correct |
8 ms |
7228 KB |
Output is correct |
35 |
Correct |
8 ms |
7252 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4948 KB |
Output is correct |
2 |
Correct |
9 ms |
6868 KB |
Output is correct |
3 |
Correct |
8 ms |
6860 KB |
Output is correct |
4 |
Correct |
8 ms |
6868 KB |
Output is correct |
5 |
Correct |
480 ms |
93896 KB |
Output is correct |
6 |
Correct |
476 ms |
82316 KB |
Output is correct |
7 |
Correct |
389 ms |
73528 KB |
Output is correct |
8 |
Correct |
346 ms |
71432 KB |
Output is correct |
9 |
Correct |
358 ms |
75004 KB |
Output is correct |
10 |
Correct |
578 ms |
101948 KB |
Output is correct |
11 |
Correct |
540 ms |
102020 KB |
Output is correct |
12 |
Correct |
518 ms |
102024 KB |
Output is correct |
13 |
Correct |
484 ms |
101984 KB |
Output is correct |
14 |
Correct |
585 ms |
102048 KB |
Output is correct |
15 |
Correct |
781 ms |
116996 KB |
Output is correct |
16 |
Correct |
825 ms |
117940 KB |
Output is correct |
17 |
Correct |
857 ms |
116240 KB |
Output is correct |
18 |
Correct |
703 ms |
102592 KB |
Output is correct |
19 |
Correct |
709 ms |
102540 KB |
Output is correct |
20 |
Correct |
634 ms |
102692 KB |
Output is correct |
21 |
Correct |
406 ms |
100964 KB |
Output is correct |
22 |
Correct |
424 ms |
101036 KB |
Output is correct |
23 |
Correct |
412 ms |
101028 KB |
Output is correct |
24 |
Correct |
420 ms |
101152 KB |
Output is correct |
25 |
Correct |
469 ms |
101916 KB |
Output is correct |
26 |
Correct |
461 ms |
101924 KB |
Output is correct |
27 |
Correct |
479 ms |
101940 KB |
Output is correct |
28 |
Correct |
441 ms |
101852 KB |
Output is correct |
29 |
Correct |
486 ms |
101932 KB |
Output is correct |
30 |
Correct |
499 ms |
102040 KB |
Output is correct |
31 |
Correct |
449 ms |
102060 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4948 KB |
Output is correct |
2 |
Correct |
11 ms |
7216 KB |
Output is correct |
3 |
Correct |
8 ms |
7252 KB |
Output is correct |
4 |
Correct |
8 ms |
7252 KB |
Output is correct |
5 |
Correct |
365 ms |
89904 KB |
Output is correct |
6 |
Correct |
358 ms |
79128 KB |
Output is correct |
7 |
Correct |
554 ms |
95708 KB |
Output is correct |
8 |
Correct |
714 ms |
118072 KB |
Output is correct |
9 |
Correct |
683 ms |
118060 KB |
Output is correct |
10 |
Correct |
725 ms |
117992 KB |
Output is correct |
11 |
Correct |
622 ms |
117628 KB |
Output is correct |
12 |
Correct |
742 ms |
117616 KB |
Output is correct |
13 |
Correct |
613 ms |
117592 KB |
Output is correct |
14 |
Correct |
527 ms |
117880 KB |
Output is correct |
15 |
Correct |
533 ms |
117864 KB |
Output is correct |
16 |
Correct |
455 ms |
118116 KB |
Output is correct |
17 |
Correct |
471 ms |
118004 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
4948 KB |
Output is correct |
2 |
Correct |
3 ms |
4948 KB |
Output is correct |
3 |
Correct |
3 ms |
4948 KB |
Output is correct |
4 |
Correct |
3 ms |
4948 KB |
Output is correct |
5 |
Correct |
8 ms |
6848 KB |
Output is correct |
6 |
Correct |
7 ms |
6740 KB |
Output is correct |
7 |
Correct |
6 ms |
6476 KB |
Output is correct |
8 |
Correct |
7 ms |
6868 KB |
Output is correct |
9 |
Correct |
8 ms |
6940 KB |
Output is correct |
10 |
Correct |
9 ms |
6868 KB |
Output is correct |
11 |
Correct |
10 ms |
6888 KB |
Output is correct |
12 |
Correct |
8 ms |
6868 KB |
Output is correct |
13 |
Correct |
8 ms |
7124 KB |
Output is correct |
14 |
Correct |
9 ms |
7124 KB |
Output is correct |
15 |
Correct |
9 ms |
6964 KB |
Output is correct |
16 |
Correct |
12 ms |
6964 KB |
Output is correct |
17 |
Correct |
8 ms |
7048 KB |
Output is correct |
18 |
Correct |
8 ms |
7060 KB |
Output is correct |
19 |
Correct |
10 ms |
6868 KB |
Output is correct |
20 |
Correct |
8 ms |
6836 KB |
Output is correct |
21 |
Correct |
9 ms |
6860 KB |
Output is correct |
22 |
Correct |
8 ms |
6840 KB |
Output is correct |
23 |
Correct |
8 ms |
6880 KB |
Output is correct |
24 |
Correct |
10 ms |
6968 KB |
Output is correct |
25 |
Correct |
8 ms |
6868 KB |
Output is correct |
26 |
Correct |
8 ms |
6972 KB |
Output is correct |
27 |
Correct |
8 ms |
6964 KB |
Output is correct |
28 |
Correct |
8 ms |
6956 KB |
Output is correct |
29 |
Correct |
10 ms |
6868 KB |
Output is correct |
30 |
Correct |
7 ms |
6872 KB |
Output is correct |
31 |
Correct |
7 ms |
6868 KB |
Output is correct |
32 |
Correct |
10 ms |
6868 KB |
Output is correct |
33 |
Correct |
8 ms |
7272 KB |
Output is correct |
34 |
Correct |
8 ms |
7228 KB |
Output is correct |
35 |
Correct |
8 ms |
7252 KB |
Output is correct |
36 |
Correct |
3 ms |
4948 KB |
Output is correct |
37 |
Correct |
9 ms |
6868 KB |
Output is correct |
38 |
Correct |
8 ms |
6860 KB |
Output is correct |
39 |
Correct |
8 ms |
6868 KB |
Output is correct |
40 |
Correct |
480 ms |
93896 KB |
Output is correct |
41 |
Correct |
476 ms |
82316 KB |
Output is correct |
42 |
Correct |
389 ms |
73528 KB |
Output is correct |
43 |
Correct |
346 ms |
71432 KB |
Output is correct |
44 |
Correct |
358 ms |
75004 KB |
Output is correct |
45 |
Correct |
578 ms |
101948 KB |
Output is correct |
46 |
Correct |
540 ms |
102020 KB |
Output is correct |
47 |
Correct |
518 ms |
102024 KB |
Output is correct |
48 |
Correct |
484 ms |
101984 KB |
Output is correct |
49 |
Correct |
585 ms |
102048 KB |
Output is correct |
50 |
Correct |
781 ms |
116996 KB |
Output is correct |
51 |
Correct |
825 ms |
117940 KB |
Output is correct |
52 |
Correct |
857 ms |
116240 KB |
Output is correct |
53 |
Correct |
703 ms |
102592 KB |
Output is correct |
54 |
Correct |
709 ms |
102540 KB |
Output is correct |
55 |
Correct |
634 ms |
102692 KB |
Output is correct |
56 |
Correct |
406 ms |
100964 KB |
Output is correct |
57 |
Correct |
424 ms |
101036 KB |
Output is correct |
58 |
Correct |
412 ms |
101028 KB |
Output is correct |
59 |
Correct |
420 ms |
101152 KB |
Output is correct |
60 |
Correct |
469 ms |
101916 KB |
Output is correct |
61 |
Correct |
461 ms |
101924 KB |
Output is correct |
62 |
Correct |
479 ms |
101940 KB |
Output is correct |
63 |
Correct |
441 ms |
101852 KB |
Output is correct |
64 |
Correct |
486 ms |
101932 KB |
Output is correct |
65 |
Correct |
499 ms |
102040 KB |
Output is correct |
66 |
Correct |
449 ms |
102060 KB |
Output is correct |
67 |
Correct |
3 ms |
4948 KB |
Output is correct |
68 |
Correct |
11 ms |
7216 KB |
Output is correct |
69 |
Correct |
8 ms |
7252 KB |
Output is correct |
70 |
Correct |
8 ms |
7252 KB |
Output is correct |
71 |
Correct |
365 ms |
89904 KB |
Output is correct |
72 |
Correct |
358 ms |
79128 KB |
Output is correct |
73 |
Correct |
554 ms |
95708 KB |
Output is correct |
74 |
Correct |
714 ms |
118072 KB |
Output is correct |
75 |
Correct |
683 ms |
118060 KB |
Output is correct |
76 |
Correct |
725 ms |
117992 KB |
Output is correct |
77 |
Correct |
622 ms |
117628 KB |
Output is correct |
78 |
Correct |
742 ms |
117616 KB |
Output is correct |
79 |
Correct |
613 ms |
117592 KB |
Output is correct |
80 |
Correct |
527 ms |
117880 KB |
Output is correct |
81 |
Correct |
533 ms |
117864 KB |
Output is correct |
82 |
Correct |
455 ms |
118116 KB |
Output is correct |
83 |
Correct |
471 ms |
118004 KB |
Output is correct |
84 |
Correct |
436 ms |
92944 KB |
Output is correct |
85 |
Correct |
416 ms |
80680 KB |
Output is correct |
86 |
Correct |
285 ms |
61556 KB |
Output is correct |
87 |
Correct |
548 ms |
101988 KB |
Output is correct |
88 |
Correct |
536 ms |
102028 KB |
Output is correct |
89 |
Correct |
546 ms |
101928 KB |
Output is correct |
90 |
Correct |
538 ms |
102008 KB |
Output is correct |
91 |
Correct |
540 ms |
101980 KB |
Output is correct |
92 |
Correct |
801 ms |
112348 KB |
Output is correct |
93 |
Correct |
760 ms |
115864 KB |
Output is correct |
94 |
Correct |
724 ms |
102684 KB |
Output is correct |
95 |
Correct |
674 ms |
102664 KB |
Output is correct |
96 |
Correct |
621 ms |
102592 KB |
Output is correct |
97 |
Correct |
636 ms |
102512 KB |
Output is correct |
98 |
Correct |
407 ms |
101180 KB |
Output is correct |
99 |
Correct |
449 ms |
100920 KB |
Output is correct |
100 |
Correct |
408 ms |
101200 KB |
Output is correct |
101 |
Correct |
401 ms |
101012 KB |
Output is correct |
102 |
Correct |
459 ms |
101944 KB |
Output is correct |
103 |
Correct |
457 ms |
101976 KB |
Output is correct |
104 |
Correct |
479 ms |
101952 KB |
Output is correct |
105 |
Correct |
403 ms |
102036 KB |
Output is correct |
106 |
Correct |
407 ms |
101944 KB |
Output is correct |
107 |
Correct |
446 ms |
101944 KB |
Output is correct |
108 |
Correct |
483 ms |
101964 KB |
Output is correct |