#include "race.h"
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<ll, ll>;
const int MxN = 2e5 + 5, MxK = 1e6 + 5;
ll d, sz[MxN], rpar, mn[MxK], ans = 1e12;
vector<pii> v[MxN], u[MxN];
vector<ll> t;
bool f[MxN];
ll dfssz (ll cur, ll par) {
sz[cur] = 1;
for (auto &[x, y]: v[cur]) if (par != x && !f[x]) sz[cur] += dfssz(x, cur);
return sz[cur];
}
ll cen (ll cur, ll par, ll now) {
for (auto &[x, y]: v[cur]) if (par != x && !f[x] && sz[x] * 2 > now) return cen(x, cur, now);
return cur;
}
void dfs (ll cur, ll par, ll dist, ll len) {
if (dist > d) return; u[rpar].emplace_back(dist, len); t.emplace_back(dist);
for (auto &[x, y]: v[cur]) if (par != x && !f[x]) dfs(x, cur, dist + y, len + 1);
}
void upd (ll cur) {
for (auto &[x, y]: u[cur]) if (x <= d && mn[d - x] != 1e12) ans = min(ans, mn[d - x] + y);
for (auto &[x, y]: u[cur]) mn[x] = min(mn[x], y);
}
void decom (ll cur) {
cur = cen(cur, 0, dfssz(cur, 0)); f[cur] = 1; mn[0] = 0;
for (auto &[x, y]: v[cur]) if (!f[x]) rpar = x, dfs(x, 0, y, 1), upd(x);
for (auto &e: t) mn[e] = 1e12; t.clear();
for (auto &[x, y]: v[cur]) if (!f[x]) u[x].clear();
for (auto &[x, y]: v[cur]) if (!f[x]) decom(x);
}
int best_path(int n, int K, int h[][2], int l[]) {
d = K;
for (int i = 0; i < MxK; i++) mn[i] = 1e12;
for (int i = 0; i < n - 1; i++) h[i][0]++, h[i][1]++;
for (int i = 0; i < n - 1; i++) v[h[i][0]].emplace_back(h[i][1], l[i]), v[h[i][1]].emplace_back(h[i][0], l[i]);
decom(1);
return (ans == 1e12 ? -1 : ans);
}
Compilation message
race.cpp: In function 'void dfs(ll, ll, ll, ll)':
race.cpp:26:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
26 | if (dist > d) return; u[rpar].emplace_back(dist, len); t.emplace_back(dist);
| ^~
race.cpp:26:25: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
26 | if (dist > d) return; u[rpar].emplace_back(dist, len); t.emplace_back(dist);
| ^
race.cpp: In function 'void decom(ll)':
race.cpp:38:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
38 | for (auto &e: t) mn[e] = 1e12; t.clear();
| ^~~
race.cpp:38:34: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
38 | for (auto &e: t) mn[e] = 1e12; t.clear();
| ^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
23128 KB |
Output is correct |
| 2 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 3 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 4 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 5 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 6 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 7 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 8 |
Correct |
4 ms |
23016 KB |
Output is correct |
| 9 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 10 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 11 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 12 |
Correct |
4 ms |
23012 KB |
Output is correct |
| 13 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 14 |
Correct |
4 ms |
23032 KB |
Output is correct |
| 15 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 16 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 17 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 18 |
Correct |
4 ms |
22876 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
23128 KB |
Output is correct |
| 2 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 3 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 4 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 5 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 6 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 7 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 8 |
Correct |
4 ms |
23016 KB |
Output is correct |
| 9 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 10 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 11 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 12 |
Correct |
4 ms |
23012 KB |
Output is correct |
| 13 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 14 |
Correct |
4 ms |
23032 KB |
Output is correct |
| 15 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 16 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 17 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 18 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 19 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 20 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 21 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 22 |
Correct |
4 ms |
23008 KB |
Output is correct |
| 23 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 24 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 25 |
Correct |
4 ms |
23128 KB |
Output is correct |
| 26 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 27 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 28 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 29 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 30 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 31 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 32 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 33 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 34 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 35 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 36 |
Correct |
4 ms |
23072 KB |
Output is correct |
| 37 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 38 |
Correct |
4 ms |
23132 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
23128 KB |
Output is correct |
| 2 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 3 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 4 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 5 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 6 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 7 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 8 |
Correct |
4 ms |
23016 KB |
Output is correct |
| 9 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 10 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 11 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 12 |
Correct |
4 ms |
23012 KB |
Output is correct |
| 13 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 14 |
Correct |
4 ms |
23032 KB |
Output is correct |
| 15 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 16 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 17 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 18 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 19 |
Correct |
90 ms |
44884 KB |
Output is correct |
| 20 |
Correct |
94 ms |
45648 KB |
Output is correct |
| 21 |
Correct |
106 ms |
48000 KB |
Output is correct |
| 22 |
Correct |
87 ms |
46316 KB |
Output is correct |
| 23 |
Correct |
59 ms |
36688 KB |
Output is correct |
| 24 |
Correct |
47 ms |
35872 KB |
Output is correct |
| 25 |
Correct |
97 ms |
55124 KB |
Output is correct |
| 26 |
Correct |
96 ms |
67084 KB |
Output is correct |
| 27 |
Correct |
131 ms |
50260 KB |
Output is correct |
| 28 |
Correct |
177 ms |
55636 KB |
Output is correct |
| 29 |
Correct |
208 ms |
54612 KB |
Output is correct |
| 30 |
Correct |
131 ms |
50260 KB |
Output is correct |
| 31 |
Correct |
127 ms |
50088 KB |
Output is correct |
| 32 |
Correct |
149 ms |
48484 KB |
Output is correct |
| 33 |
Correct |
164 ms |
65364 KB |
Output is correct |
| 34 |
Correct |
117 ms |
38664 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
23128 KB |
Output is correct |
| 2 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 3 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 4 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 5 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 6 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 7 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 8 |
Correct |
4 ms |
23016 KB |
Output is correct |
| 9 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 10 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 11 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 12 |
Correct |
4 ms |
23012 KB |
Output is correct |
| 13 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 14 |
Correct |
4 ms |
23032 KB |
Output is correct |
| 15 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 16 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 17 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 18 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 19 |
Correct |
4 ms |
22872 KB |
Output is correct |
| 20 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 21 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 22 |
Correct |
4 ms |
23008 KB |
Output is correct |
| 23 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 24 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 25 |
Correct |
4 ms |
23128 KB |
Output is correct |
| 26 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 27 |
Correct |
4 ms |
22876 KB |
Output is correct |
| 28 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 29 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 30 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 31 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 32 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 33 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 34 |
Correct |
5 ms |
23132 KB |
Output is correct |
| 35 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 36 |
Correct |
4 ms |
23072 KB |
Output is correct |
| 37 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 38 |
Correct |
4 ms |
23132 KB |
Output is correct |
| 39 |
Correct |
90 ms |
44884 KB |
Output is correct |
| 40 |
Correct |
94 ms |
45648 KB |
Output is correct |
| 41 |
Correct |
106 ms |
48000 KB |
Output is correct |
| 42 |
Correct |
87 ms |
46316 KB |
Output is correct |
| 43 |
Correct |
59 ms |
36688 KB |
Output is correct |
| 44 |
Correct |
47 ms |
35872 KB |
Output is correct |
| 45 |
Correct |
97 ms |
55124 KB |
Output is correct |
| 46 |
Correct |
96 ms |
67084 KB |
Output is correct |
| 47 |
Correct |
131 ms |
50260 KB |
Output is correct |
| 48 |
Correct |
177 ms |
55636 KB |
Output is correct |
| 49 |
Correct |
208 ms |
54612 KB |
Output is correct |
| 50 |
Correct |
131 ms |
50260 KB |
Output is correct |
| 51 |
Correct |
127 ms |
50088 KB |
Output is correct |
| 52 |
Correct |
149 ms |
48484 KB |
Output is correct |
| 53 |
Correct |
164 ms |
65364 KB |
Output is correct |
| 54 |
Correct |
117 ms |
38664 KB |
Output is correct |
| 55 |
Correct |
10 ms |
24668 KB |
Output is correct |
| 56 |
Correct |
12 ms |
25180 KB |
Output is correct |
| 57 |
Correct |
74 ms |
56536 KB |
Output is correct |
| 58 |
Correct |
34 ms |
34756 KB |
Output is correct |
| 59 |
Correct |
84 ms |
66876 KB |
Output is correct |
| 60 |
Correct |
314 ms |
111928 KB |
Output is correct |
| 61 |
Correct |
177 ms |
56776 KB |
Output is correct |
| 62 |
Correct |
146 ms |
63424 KB |
Output is correct |
| 63 |
Correct |
185 ms |
63588 KB |
Output is correct |
| 64 |
Correct |
343 ms |
80292 KB |
Output is correct |
| 65 |
Correct |
124 ms |
39420 KB |
Output is correct |
| 66 |
Correct |
308 ms |
92156 KB |
Output is correct |
| 67 |
Correct |
100 ms |
46524 KB |
Output is correct |
| 68 |
Correct |
176 ms |
58264 KB |
Output is correct |
| 69 |
Correct |
187 ms |
57928 KB |
Output is correct |
| 70 |
Correct |
166 ms |
56396 KB |
Output is correct |
