#include "railroad.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
#define all(x) (x).begin(), (x).end()
#define debug(x) cerr << #x << ": " << x << endl;
#define sep ' '
#define X first
#define Y second
const ll MAXN = 1e6 + 10;
const ll INF = 1e9 + 7;
int n, cnt[MAXN], par[MAXN];
vector<int> comp_vec;
ll k;
int find(int v) {
return par[v] == v ? v : par[v] = find(par[v]);
}
inline bool unite(int u, int v) {
int u_ = u, v_ = v;
u = find(u), v = find(v);
if (u == v) return false;
par[u] = v;
// cerr << "unite: " << u_ << " " << v_ << endl;
return true;
}
inline int ind(int x) {
return lower_bound(all(comp_vec), x) - comp_vec.begin();
}
ll plan_roller_coaster(vector<int> s, vector<int> t) {
s.push_back(0);
t.push_back(1e9 + 7);
ll ans = 0;
for (int i = 0; i < int(s.size()); i++) {
comp_vec.push_back(s[i]);
comp_vec.push_back(t[i]);
k += t[i] - s[i];
}
sort(all(comp_vec));
comp_vec.resize(unique(all(comp_vec)) - comp_vec.begin());
int m = comp_vec.size();
for (int i = 0; i < m; i++) par[i] = i;
k -= 1e9 + 7;
for (int i = 0; i < int(s.size()); i++) {
cnt[ind(s[i])]++;
cnt[ind(t[i])]--;
unite(ind(s[i]), ind(t[i]));
}
int tot = -1;
vector<pair<int, pll>> edges;
for (int i = 0; i < m - 1; i++) {
tot += cnt[i];
if (tot <= 0) {
//ans += 1ll * (1 - tot) * (comp_vec[i + 1] - comp_vec[i]);
unite(i, i + 1);
} else if (tot > 1) {
unite(i, i + 1);
ans += 1ll * (tot - 1) * (comp_vec[i + 1] - comp_vec[i]);
}
//cerr << tot << sep << comp_vec[i] << sep << ans << endl;
edges.push_back({comp_vec[i + 1] - comp_vec[i], {i, i + 1}});
}
sort(all(edges));
for (auto [x, e] : edges)
if (unite(e.X, e.Y)){
// cerr << e.X << ' ' << e.Y << ' ' << x << endl;
ans += x;
}
return ans;
}
Compilation message
railroad.cpp: In function 'bool unite(int, int)':
railroad.cpp:26:6: warning: unused variable 'u_' [-Wunused-variable]
26 | int u_ = u, v_ = v;
| ^~
railroad.cpp:26:14: warning: unused variable 'v_' [-Wunused-variable]
26 | int u_ = u, v_ = v;
| ^~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
n = 2 |
2 |
Correct |
1 ms |
212 KB |
n = 2 |
3 |
Correct |
0 ms |
212 KB |
n = 2 |
4 |
Correct |
0 ms |
312 KB |
n = 2 |
5 |
Correct |
0 ms |
304 KB |
n = 2 |
6 |
Correct |
0 ms |
212 KB |
n = 2 |
7 |
Correct |
0 ms |
312 KB |
n = 3 |
8 |
Correct |
0 ms |
212 KB |
n = 3 |
9 |
Correct |
0 ms |
212 KB |
n = 3 |
10 |
Correct |
0 ms |
212 KB |
n = 8 |
11 |
Correct |
0 ms |
212 KB |
n = 8 |
12 |
Correct |
1 ms |
212 KB |
n = 8 |
13 |
Correct |
0 ms |
212 KB |
n = 8 |
14 |
Correct |
0 ms |
212 KB |
n = 8 |
15 |
Correct |
0 ms |
212 KB |
n = 8 |
16 |
Correct |
0 ms |
212 KB |
n = 8 |
17 |
Correct |
0 ms |
212 KB |
n = 8 |
18 |
Correct |
0 ms |
212 KB |
n = 8 |
19 |
Correct |
0 ms |
212 KB |
n = 3 |
20 |
Correct |
0 ms |
212 KB |
n = 7 |
21 |
Correct |
0 ms |
212 KB |
n = 8 |
22 |
Correct |
0 ms |
212 KB |
n = 8 |
23 |
Correct |
0 ms |
212 KB |
n = 8 |
24 |
Correct |
1 ms |
212 KB |
n = 8 |
25 |
Correct |
0 ms |
212 KB |
n = 8 |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
n = 2 |
2 |
Correct |
1 ms |
212 KB |
n = 2 |
3 |
Correct |
0 ms |
212 KB |
n = 2 |
4 |
Correct |
0 ms |
312 KB |
n = 2 |
5 |
Correct |
0 ms |
304 KB |
n = 2 |
6 |
Correct |
0 ms |
212 KB |
n = 2 |
7 |
Correct |
0 ms |
312 KB |
n = 3 |
8 |
Correct |
0 ms |
212 KB |
n = 3 |
9 |
Correct |
0 ms |
212 KB |
n = 3 |
10 |
Correct |
0 ms |
212 KB |
n = 8 |
11 |
Correct |
0 ms |
212 KB |
n = 8 |
12 |
Correct |
1 ms |
212 KB |
n = 8 |
13 |
Correct |
0 ms |
212 KB |
n = 8 |
14 |
Correct |
0 ms |
212 KB |
n = 8 |
15 |
Correct |
0 ms |
212 KB |
n = 8 |
16 |
Correct |
0 ms |
212 KB |
n = 8 |
17 |
Correct |
0 ms |
212 KB |
n = 8 |
18 |
Correct |
0 ms |
212 KB |
n = 8 |
19 |
Correct |
0 ms |
212 KB |
n = 3 |
20 |
Correct |
0 ms |
212 KB |
n = 7 |
21 |
Correct |
0 ms |
212 KB |
n = 8 |
22 |
Correct |
0 ms |
212 KB |
n = 8 |
23 |
Correct |
0 ms |
212 KB |
n = 8 |
24 |
Correct |
1 ms |
212 KB |
n = 8 |
25 |
Correct |
0 ms |
212 KB |
n = 8 |
26 |
Correct |
0 ms |
212 KB |
n = 8 |
27 |
Correct |
0 ms |
276 KB |
n = 8 |
28 |
Correct |
0 ms |
212 KB |
n = 8 |
29 |
Correct |
0 ms |
212 KB |
n = 16 |
30 |
Correct |
0 ms |
212 KB |
n = 16 |
31 |
Correct |
0 ms |
308 KB |
n = 16 |
32 |
Correct |
1 ms |
212 KB |
n = 16 |
33 |
Correct |
1 ms |
212 KB |
n = 16 |
34 |
Correct |
0 ms |
212 KB |
n = 16 |
35 |
Correct |
1 ms |
304 KB |
n = 16 |
36 |
Correct |
1 ms |
212 KB |
n = 15 |
37 |
Correct |
0 ms |
212 KB |
n = 8 |
38 |
Correct |
0 ms |
212 KB |
n = 16 |
39 |
Correct |
0 ms |
212 KB |
n = 16 |
40 |
Correct |
1 ms |
212 KB |
n = 9 |
41 |
Correct |
0 ms |
212 KB |
n = 16 |
42 |
Correct |
0 ms |
212 KB |
n = 16 |
43 |
Correct |
0 ms |
212 KB |
n = 16 |
44 |
Correct |
0 ms |
312 KB |
n = 9 |
45 |
Correct |
0 ms |
212 KB |
n = 15 |
46 |
Correct |
0 ms |
212 KB |
n = 16 |
47 |
Correct |
0 ms |
212 KB |
n = 16 |
48 |
Correct |
0 ms |
212 KB |
n = 16 |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
208 ms |
25832 KB |
n = 199999 |
2 |
Correct |
219 ms |
25828 KB |
n = 199991 |
3 |
Correct |
229 ms |
25836 KB |
n = 199993 |
4 |
Correct |
157 ms |
22708 KB |
n = 152076 |
5 |
Correct |
93 ms |
12708 KB |
n = 93249 |
6 |
Correct |
184 ms |
24124 KB |
n = 199910 |
7 |
Correct |
194 ms |
24992 KB |
n = 199999 |
8 |
Correct |
184 ms |
24220 KB |
n = 199997 |
9 |
Correct |
185 ms |
24068 KB |
n = 171294 |
10 |
Correct |
152 ms |
22368 KB |
n = 140872 |
11 |
Correct |
188 ms |
24148 KB |
n = 199886 |
12 |
Correct |
199 ms |
25112 KB |
n = 199996 |
13 |
Correct |
195 ms |
24376 KB |
n = 200000 |
14 |
Correct |
195 ms |
24916 KB |
n = 199998 |
15 |
Correct |
196 ms |
24856 KB |
n = 200000 |
16 |
Correct |
202 ms |
25344 KB |
n = 199998 |
17 |
Correct |
207 ms |
28188 KB |
n = 200000 |
18 |
Correct |
195 ms |
25432 KB |
n = 190000 |
19 |
Correct |
179 ms |
26584 KB |
n = 177777 |
20 |
Correct |
96 ms |
13104 KB |
n = 100000 |
21 |
Correct |
203 ms |
25840 KB |
n = 200000 |
22 |
Correct |
199 ms |
25880 KB |
n = 200000 |
23 |
Correct |
199 ms |
25840 KB |
n = 200000 |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
n = 2 |
2 |
Correct |
1 ms |
212 KB |
n = 2 |
3 |
Correct |
0 ms |
212 KB |
n = 2 |
4 |
Correct |
0 ms |
312 KB |
n = 2 |
5 |
Correct |
0 ms |
304 KB |
n = 2 |
6 |
Correct |
0 ms |
212 KB |
n = 2 |
7 |
Correct |
0 ms |
312 KB |
n = 3 |
8 |
Correct |
0 ms |
212 KB |
n = 3 |
9 |
Correct |
0 ms |
212 KB |
n = 3 |
10 |
Correct |
0 ms |
212 KB |
n = 8 |
11 |
Correct |
0 ms |
212 KB |
n = 8 |
12 |
Correct |
1 ms |
212 KB |
n = 8 |
13 |
Correct |
0 ms |
212 KB |
n = 8 |
14 |
Correct |
0 ms |
212 KB |
n = 8 |
15 |
Correct |
0 ms |
212 KB |
n = 8 |
16 |
Correct |
0 ms |
212 KB |
n = 8 |
17 |
Correct |
0 ms |
212 KB |
n = 8 |
18 |
Correct |
0 ms |
212 KB |
n = 8 |
19 |
Correct |
0 ms |
212 KB |
n = 3 |
20 |
Correct |
0 ms |
212 KB |
n = 7 |
21 |
Correct |
0 ms |
212 KB |
n = 8 |
22 |
Correct |
0 ms |
212 KB |
n = 8 |
23 |
Correct |
0 ms |
212 KB |
n = 8 |
24 |
Correct |
1 ms |
212 KB |
n = 8 |
25 |
Correct |
0 ms |
212 KB |
n = 8 |
26 |
Correct |
0 ms |
212 KB |
n = 8 |
27 |
Correct |
0 ms |
276 KB |
n = 8 |
28 |
Correct |
0 ms |
212 KB |
n = 8 |
29 |
Correct |
0 ms |
212 KB |
n = 16 |
30 |
Correct |
0 ms |
212 KB |
n = 16 |
31 |
Correct |
0 ms |
308 KB |
n = 16 |
32 |
Correct |
1 ms |
212 KB |
n = 16 |
33 |
Correct |
1 ms |
212 KB |
n = 16 |
34 |
Correct |
0 ms |
212 KB |
n = 16 |
35 |
Correct |
1 ms |
304 KB |
n = 16 |
36 |
Correct |
1 ms |
212 KB |
n = 15 |
37 |
Correct |
0 ms |
212 KB |
n = 8 |
38 |
Correct |
0 ms |
212 KB |
n = 16 |
39 |
Correct |
0 ms |
212 KB |
n = 16 |
40 |
Correct |
1 ms |
212 KB |
n = 9 |
41 |
Correct |
0 ms |
212 KB |
n = 16 |
42 |
Correct |
0 ms |
212 KB |
n = 16 |
43 |
Correct |
0 ms |
212 KB |
n = 16 |
44 |
Correct |
0 ms |
312 KB |
n = 9 |
45 |
Correct |
0 ms |
212 KB |
n = 15 |
46 |
Correct |
0 ms |
212 KB |
n = 16 |
47 |
Correct |
0 ms |
212 KB |
n = 16 |
48 |
Correct |
0 ms |
212 KB |
n = 16 |
49 |
Correct |
208 ms |
25832 KB |
n = 199999 |
50 |
Correct |
219 ms |
25828 KB |
n = 199991 |
51 |
Correct |
229 ms |
25836 KB |
n = 199993 |
52 |
Correct |
157 ms |
22708 KB |
n = 152076 |
53 |
Correct |
93 ms |
12708 KB |
n = 93249 |
54 |
Correct |
184 ms |
24124 KB |
n = 199910 |
55 |
Correct |
194 ms |
24992 KB |
n = 199999 |
56 |
Correct |
184 ms |
24220 KB |
n = 199997 |
57 |
Correct |
185 ms |
24068 KB |
n = 171294 |
58 |
Correct |
152 ms |
22368 KB |
n = 140872 |
59 |
Correct |
188 ms |
24148 KB |
n = 199886 |
60 |
Correct |
199 ms |
25112 KB |
n = 199996 |
61 |
Correct |
195 ms |
24376 KB |
n = 200000 |
62 |
Correct |
195 ms |
24916 KB |
n = 199998 |
63 |
Correct |
196 ms |
24856 KB |
n = 200000 |
64 |
Correct |
202 ms |
25344 KB |
n = 199998 |
65 |
Correct |
207 ms |
28188 KB |
n = 200000 |
66 |
Correct |
195 ms |
25432 KB |
n = 190000 |
67 |
Correct |
179 ms |
26584 KB |
n = 177777 |
68 |
Correct |
96 ms |
13104 KB |
n = 100000 |
69 |
Correct |
203 ms |
25840 KB |
n = 200000 |
70 |
Correct |
199 ms |
25880 KB |
n = 200000 |
71 |
Correct |
199 ms |
25840 KB |
n = 200000 |
72 |
Correct |
208 ms |
25884 KB |
n = 200000 |
73 |
Correct |
211 ms |
25892 KB |
n = 200000 |
74 |
Correct |
213 ms |
25832 KB |
n = 200000 |
75 |
Correct |
199 ms |
25832 KB |
n = 200000 |
76 |
Correct |
201 ms |
25832 KB |
n = 200000 |
77 |
Correct |
161 ms |
18948 KB |
n = 200000 |
78 |
Correct |
177 ms |
18136 KB |
n = 200000 |
79 |
Correct |
196 ms |
24736 KB |
n = 184307 |
80 |
Correct |
74 ms |
11672 KB |
n = 76040 |
81 |
Correct |
185 ms |
24156 KB |
n = 199981 |
82 |
Correct |
199 ms |
25112 KB |
n = 199994 |
83 |
Correct |
187 ms |
24380 KB |
n = 199996 |
84 |
Correct |
195 ms |
24968 KB |
n = 199998 |
85 |
Correct |
197 ms |
24884 KB |
n = 200000 |
86 |
Correct |
202 ms |
25292 KB |
n = 199998 |
87 |
Correct |
201 ms |
28168 KB |
n = 200000 |
88 |
Correct |
203 ms |
26272 KB |
n = 200000 |
89 |
Correct |
197 ms |
28176 KB |
n = 200000 |
90 |
Correct |
203 ms |
25888 KB |
n = 200000 |
91 |
Correct |
200 ms |
25868 KB |
n = 200000 |
92 |
Correct |
196 ms |
25840 KB |
n = 200000 |