/tmp/solutions/build/jump_on_tree-main.cpp:
1| |#include <common.h>
2| |prelude;
3| |
4| |namespace {
5| |
6| |constexpr int N = 5e5;
7| |
8| |struct {
9| | int to;
10| | int nxt;
11| |} edge[N * 2];
12| |int head[N];
13| |int size[N];
14| |int depth[N];
15| |int heavy[N];
16| |int ances[N];
17| |int parent[N];
18| |int node2id[N];
19| |int id2node[N];
20| |int id;
21| |
22| 8|def build_step_1(int u, int d, int p) -> void {
23| 8| size[u] = 1;
24| 8| depth[u] = d;
25| 8| parent[u] = p;
26| 22| for (int e = head[u]; e; e = edge[e].nxt) {
^14
------------------
| Branch (26:25): [True: 63.64%, False: 36.36%]
------------------
27| 14| if (int v = edge[e].to; v != p) {
------------------
| Branch (27:29): [True: 50.00%, False: 50.00%]
------------------
28| 7| build_step_1(v, d + 1, u);
29| 7| size[u] += size[v];
30| 7| if (heavy[u] == 0 || size[v] > size[heavy[u]]) {
^3
------------------
| Branch (30:11): [True: 57.14%, False: 42.86%]
| Branch (30:28): [True: 66.67%, False: 33.33%]
------------------
31| 6| heavy[u] = v;
32| 6| }
33| 7| }
34| 14| }
35| 8|}
36| |
37| 8|def build_step_2(int u, int a, int p) -> void {
38| 8| node2id[u] = id;
39| 8| id2node[id] = u;
40| 8| ++id;
41| 8| ances[u] = a;
42| 8| if (heavy[u]) build_step_2(heavy[u], a, u);
^4
------------------
| Branch (42:7): [True: 50.00%, False: 50.00%]
------------------
43| 22| for (int e = head[u]; e; e = edge[e].nxt) {
^14
------------------
| Branch (43:25): [True: 63.64%, False: 36.36%]
------------------
44| 14| if (int v = edge[e].to; v != heavy[u] && v != p) {
^10
------------------
| Branch (44:29): [True: 71.43%, False: 28.57%]
| Branch (44:46): [True: 30.00%, False: 70.00%]
------------------
45| 3| build_step_2(v, v, u);
46| 3| }
47| 14| }
48| 8|}
49| |
50| 13|def lca(int u, int v) -> int {
51| 13| if (depth[u] < 32 && depth[v] < 32) {
------------------
| Branch (51:7): [True: 100.00%, False: 0.00%]
| Branch (51:24): [True: 100.00%, False: 0.00%]
------------------
52| 13| while (depth[u] > depth[v]) {
------------------
| Branch (52:12): [True: 0.00%, False: 100.00%]
------------------
53| 0| u = parent[u];
54| 0| }
55| 18| while (depth[v] > depth[u]) {
------------------
| Branch (55:12): [True: 27.78%, False: 72.22%]
------------------
56| 5| v = parent[v];
57| 5| }
58| 30| while (u != v) {
------------------
| Branch (58:12): [True: 56.67%, False: 43.33%]
------------------
59| 17| u = parent[u];
60| 17| v = parent[v];
61| 17| }
62| 13| return u;
63| 13| }
64| 0| while (ances[u] != ances[v]) {
------------------
| Branch (64:10): [True: 0.00%, False: 0.00%]
------------------
65| 0| if (depth[ances[u]] > depth[ances[v]]) {
------------------
| Branch (65:9): [True: 0.00%, False: 0.00%]
------------------
66| 0| u = parent[ances[u]];
67| 0| } else {
68| 0| v = parent[ances[v]];
69| 0| }
70| 0| }
71| 0| return depth[u] < depth[v] ? u : v;
------------------
| Branch (71:10): [True: 0.00%, False: 0.00%]
------------------
72| 13|}
73| |
74| 10|def jump(int u, int d) -> int {
75| 10| if (int t = depth[u] - d; t < 32) {
------------------
| Branch (75:29): [True: 100.00%, False: 0.00%]
------------------
76| 16| while (t--) u = parent[u];
^6
------------------
| Branch (76:12): [True: 37.50%, False: 62.50%]
------------------
77| 10| return u;
78| 10| }
79| 0| while (depth[ances[u]] > d) {
------------------
| Branch (79:10): [True: 0.00%, False: 0.00%]
------------------
80| 0| u = parent[ances[u]];
81| 0| }
82| 0| return id2node[node2id[u] - depth[u] + d];
83| 10|}
84| |
85| |} // namespace
86| |
87| 1|int main() {
88| 1| rd rd;
89| 1| wt wt;
90| 1| int n = rd.uh();
91| 1| int q = rd.uh();
92| 1|#ifdef LOCAL
93| 1| id = 0;
94| 1| std::memset(head, 0, 4 * n);
95| 1| std::memset(heavy, 0, 4 * n);
96| 1| std::memset(parent, 0, 4 * n);
97| 1|#endif
98| 8| for (int i = 1; i < n; ++i) {
^7
------------------
| Branch (98:19): [True: 87.50%, False: 12.50%]
------------------
99| 7| int a = rd.uh();
100| 7| int b = rd.uh();
101| 7| edge[i * 2 | 0] = {b, head[a]}, head[a] = i * 2 | 0;
102| 7| edge[i * 2 | 1] = {a, head[b]}, head[b] = i * 2 | 1;
103| 7| }
104| 1| build_step_1(0, 0, -1);
105| 1| build_step_2(0, 0, -1);
106| 14| while (q--) {
------------------
| Branch (106:10): [True: 92.86%, False: 7.14%]
------------------
107| 13| int u = rd.uh();
108| 13| int v = rd.uh();
109| 13| int k = rd.uh();
110| 13| int w = lca(u, v);
111| 13| int du = depth[u];
112| 13| int dv = depth[v];
113| 13| int dw = depth[w];
114| 13| if (k <= du - dw) {
------------------
| Branch (114:9): [True: 46.15%, False: 53.85%]
------------------
115| 6| int x = jump(u, du - k);
116| 6| wt.uw(x);
117| 7| } else if (k <= du + dv - dw - dw) {
------------------
| Branch (117:16): [True: 57.14%, False: 42.86%]
------------------
118| 4| int x = jump(v, dw + dw - du + k);
119| 4| wt.uw(x);
120| 4| } else {
121| 3| wt.puts(" -1", 3);
122| 3| }
123| 13| }
124| 1| return 0;
125| 1|}