Submission #1027508

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1027508	2024-07-19T07:10:12 Z	mansur	Fire (BOI24_fire)	C++17	40 / 100	72 ms	28132 KB

Main

#include<bits/stdc++.h>

using namespace std;

#define rall(s) s.rbegin(), s.rend()
#define all(s) s.begin(), s.end()
#define sz(s) (int)s.size()
#define s second
#define f first

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int N = 1e6;
const int inf = 1e9;

int lg[N], up[N][20];

void solve() {
	int n, m;
	cin >> n >> m;
	int l[n + 1], r[n + 1];
	vector<array<int, 3>> s;
	for (int i = 1; i <= n; i++) {
		cin >> l[i] >> r[i];
		if (r[i] < l[i]) r[i] += m;
		s.push_back({l[i], 0, i});
		s.push_back({r[i], 1, i});
	}
	sort(all(s));
	int mx = -1, vt;
	for (auto [p, is, id]: s) {
		if (!is) {
			if (r[id] > mx) {
			 	mx = r[id];
			 	vt = id;
			}
		}else up[id][0] = vt;
	}
	for (int k = 1; k <= lg[n]; k++) {
		for (int i = 1; i <= n; i++) {
			up[i][k] = up[up[i][k - 1]][k - 1];			
		}
	}
	int mn = inf;
	for (int i = 1; i <= n; i++) {
		if (r[i] - l[i] + 1 >= m) {
			mn = 1;
			break;
		}
		int tl = l[i], v = i, ans = 2;
		for (int k = lg[n]; k >= 0; k--) {
            int tr = r[up[v][k]];
            if (tr - tl + 1 >= m) continue;
            v = up[v][k];
            ans += (1 << k);
        }
        v = up[v][0];              
        if (r[v] - tl + 1 < m) continue;
        mn = min(mn, ans);
	}
	if (mn > n) cout << -1;
	else cout << mn;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	for (int i = 1; i < N; i++) lg[i] = lg[i / 2] + 1;
	solve();
}

Compilation message

Main.cpp: In function 'void solve()':
Main.cpp:39:19: warning: 'vt' may be used uninitialized in this function [-Wmaybe-uninitialized]
   39 |   }else up[id][0] = vt;
      |         ~~~~~~~~~~^~~~

Subtask #1
14.0 / 14.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	4184 KB	Output is correct
2	Correct	2 ms	4184 KB	Output is correct
3	Correct	2 ms	4188 KB	Output is correct
4	Correct	2 ms	4188 KB	Output is correct
5	Correct	4 ms	4236 KB	Output is correct
6	Correct	4 ms	4188 KB	Output is correct
7	Correct	3 ms	4188 KB	Output is correct
8	Correct	3 ms	4188 KB	Output is correct
9	Correct	2 ms	4188 KB	Output is correct
10	Correct	2 ms	4188 KB	Output is correct
11	Correct	4 ms	4376 KB	Output is correct
12	Correct	4 ms	4188 KB	Output is correct
13	Correct	2 ms	4188 KB	Output is correct
14	Correct	2 ms	4188 KB	Output is correct
15	Correct	3 ms	4188 KB	Output is correct
16	Correct	2 ms	4188 KB	Output is correct
17	Correct	4 ms	4380 KB	Output is correct
18	Correct	4 ms	4188 KB	Output is correct
19	Correct	2 ms	4188 KB	Output is correct
20	Correct	3 ms	4376 KB	Output is correct
21	Correct	3 ms	4376 KB	Output is correct
22	Correct	3 ms	4188 KB	Output is correct
23	Correct	2 ms	4188 KB	Output is correct

Subtask #2
17.0 / 17.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	4184 KB	Output is correct
2	Correct	2 ms	4184 KB	Output is correct
3	Correct	2 ms	4188 KB	Output is correct
4	Correct	2 ms	4188 KB	Output is correct
5	Correct	4 ms	4236 KB	Output is correct
6	Correct	4 ms	4188 KB	Output is correct
7	Correct	3 ms	4188 KB	Output is correct
8	Correct	3 ms	4188 KB	Output is correct
9	Correct	2 ms	4188 KB	Output is correct
10	Correct	2 ms	4188 KB	Output is correct
11	Correct	4 ms	4376 KB	Output is correct
12	Correct	4 ms	4188 KB	Output is correct
13	Correct	2 ms	4188 KB	Output is correct
14	Correct	2 ms	4188 KB	Output is correct
15	Correct	3 ms	4188 KB	Output is correct
16	Correct	2 ms	4188 KB	Output is correct
17	Correct	4 ms	4380 KB	Output is correct
18	Correct	4 ms	4188 KB	Output is correct
19	Correct	2 ms	4188 KB	Output is correct
20	Correct	3 ms	4376 KB	Output is correct
21	Correct	3 ms	4376 KB	Output is correct
22	Correct	3 ms	4188 KB	Output is correct
23	Correct	2 ms	4188 KB	Output is correct
24	Correct	3 ms	4188 KB	Output is correct
25	Correct	3 ms	4188 KB	Output is correct
26	Correct	3 ms	4188 KB	Output is correct
27	Correct	3 ms	4324 KB	Output is correct
28	Correct	3 ms	4188 KB	Output is correct
29	Correct	2 ms	4188 KB	Output is correct
30	Correct	2 ms	4188 KB	Output is correct
31	Correct	3 ms	4376 KB	Output is correct
32	Correct	3 ms	4320 KB	Output is correct
33	Correct	2 ms	4188 KB	Output is correct
34	Correct	2 ms	4380 KB	Output is correct
35	Correct	2 ms	4188 KB	Output is correct
36	Correct	2 ms	4188 KB	Output is correct
37	Correct	2 ms	4284 KB	Output is correct
38	Correct	2 ms	4184 KB	Output is correct

Subtask #3
9.0 / 9.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	4184 KB	Output is correct
2	Correct	2 ms	4184 KB	Output is correct
3	Correct	2 ms	4188 KB	Output is correct
4	Correct	2 ms	4188 KB	Output is correct
5	Correct	4 ms	4236 KB	Output is correct
6	Correct	4 ms	4188 KB	Output is correct
7	Correct	3 ms	4188 KB	Output is correct
8	Correct	3 ms	4188 KB	Output is correct
9	Correct	2 ms	4188 KB	Output is correct
10	Correct	2 ms	4188 KB	Output is correct
11	Correct	4 ms	4376 KB	Output is correct
12	Correct	4 ms	4188 KB	Output is correct
13	Correct	2 ms	4188 KB	Output is correct
14	Correct	2 ms	4188 KB	Output is correct
15	Correct	3 ms	4188 KB	Output is correct
16	Correct	2 ms	4188 KB	Output is correct
17	Correct	4 ms	4380 KB	Output is correct
18	Correct	4 ms	4188 KB	Output is correct
19	Correct	2 ms	4188 KB	Output is correct
20	Correct	3 ms	4376 KB	Output is correct
21	Correct	3 ms	4376 KB	Output is correct
22	Correct	3 ms	4188 KB	Output is correct
23	Correct	2 ms	4188 KB	Output is correct
24	Correct	3 ms	4188 KB	Output is correct
25	Correct	3 ms	4188 KB	Output is correct
26	Correct	3 ms	4188 KB	Output is correct
27	Correct	3 ms	4324 KB	Output is correct
28	Correct	3 ms	4188 KB	Output is correct
29	Correct	2 ms	4188 KB	Output is correct
30	Correct	2 ms	4188 KB	Output is correct
31	Correct	3 ms	4376 KB	Output is correct
32	Correct	3 ms	4320 KB	Output is correct
33	Correct	2 ms	4188 KB	Output is correct
34	Correct	2 ms	4380 KB	Output is correct
35	Correct	2 ms	4188 KB	Output is correct
36	Correct	2 ms	4188 KB	Output is correct
37	Correct	2 ms	4284 KB	Output is correct
38	Correct	2 ms	4184 KB	Output is correct
39	Correct	6 ms	6936 KB	Output is correct
40	Correct	4 ms	6940 KB	Output is correct
41	Correct	4 ms	6940 KB	Output is correct
42	Correct	5 ms	6944 KB	Output is correct
43	Correct	4 ms	6940 KB	Output is correct
44	Correct	4 ms	6940 KB	Output is correct
45	Correct	4 ms	6936 KB	Output is correct
46	Correct	5 ms	6968 KB	Output is correct
47	Correct	5 ms	6940 KB	Output is correct
48	Correct	4 ms	6940 KB	Output is correct
49	Correct	3 ms	6936 KB	Output is correct
50	Correct	3 ms	6776 KB	Output is correct

Subtask #4
0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	4188 KB	Output is correct
2	Correct	2 ms	4188 KB	Output is correct
3	Correct	3 ms	4376 KB	Output is correct
4	Correct	2 ms	4328 KB	Output is correct
5	Correct	3 ms	4188 KB	Output is correct
6	Correct	2 ms	4184 KB	Output is correct
7	Correct	4 ms	4188 KB	Output is correct
8	Correct	2 ms	4188 KB	Output is correct
9	Correct	2 ms	4188 KB	Output is correct
10	Correct	4 ms	4188 KB	Output is correct
11	Correct	2 ms	4188 KB	Output is correct
12	Correct	3 ms	4188 KB	Output is correct
13	Correct	2 ms	4188 KB	Output is correct
14	Correct	3 ms	4188 KB	Output is correct
15	Correct	5 ms	6764 KB	Output is correct
16	Correct	4 ms	6880 KB	Output is correct
17	Correct	5 ms	6736 KB	Output is correct
18	Correct	4 ms	6940 KB	Output is correct
19	Correct	4 ms	6940 KB	Output is correct
20	Incorrect	71 ms	28132 KB	Output isn't correct
21	Halted	0 ms	0 KB	-

Subtask #5
0 / 21.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	4188 KB	Output is correct
2	Correct	2 ms	4188 KB	Output is correct
3	Correct	3 ms	4372 KB	Output is correct
4	Correct	3 ms	4188 KB	Output is correct
5	Correct	3 ms	4188 KB	Output is correct
6	Correct	3 ms	4184 KB	Output is correct
7	Correct	2 ms	4184 KB	Output is correct
8	Correct	3 ms	4184 KB	Output is correct
9	Correct	3 ms	4188 KB	Output is correct
10	Correct	2 ms	4188 KB	Output is correct
11	Correct	2 ms	4188 KB	Output is correct
12	Correct	5 ms	6940 KB	Output is correct
13	Correct	4 ms	6940 KB	Output is correct
14	Correct	5 ms	6832 KB	Output is correct
15	Incorrect	72 ms	28084 KB	Output isn't correct
16	Halted	0 ms	0 KB	-

Subtask #6
0 / 26.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	3 ms	4184 KB	Output is correct
2	Correct	2 ms	4184 KB	Output is correct
3	Correct	2 ms	4188 KB	Output is correct
4	Correct	2 ms	4188 KB	Output is correct
5	Correct	4 ms	4236 KB	Output is correct
6	Correct	4 ms	4188 KB	Output is correct
7	Correct	3 ms	4188 KB	Output is correct
8	Correct	3 ms	4188 KB	Output is correct
9	Correct	2 ms	4188 KB	Output is correct
10	Correct	2 ms	4188 KB	Output is correct
11	Correct	4 ms	4376 KB	Output is correct
12	Correct	4 ms	4188 KB	Output is correct
13	Correct	2 ms	4188 KB	Output is correct
14	Correct	2 ms	4188 KB	Output is correct
15	Correct	3 ms	4188 KB	Output is correct
16	Correct	2 ms	4188 KB	Output is correct
17	Correct	4 ms	4380 KB	Output is correct
18	Correct	4 ms	4188 KB	Output is correct
19	Correct	2 ms	4188 KB	Output is correct
20	Correct	3 ms	4376 KB	Output is correct
21	Correct	3 ms	4376 KB	Output is correct
22	Correct	3 ms	4188 KB	Output is correct
23	Correct	2 ms	4188 KB	Output is correct
24	Correct	3 ms	4188 KB	Output is correct
25	Correct	3 ms	4188 KB	Output is correct
26	Correct	3 ms	4188 KB	Output is correct
27	Correct	3 ms	4324 KB	Output is correct
28	Correct	3 ms	4188 KB	Output is correct
29	Correct	2 ms	4188 KB	Output is correct
30	Correct	2 ms	4188 KB	Output is correct
31	Correct	3 ms	4376 KB	Output is correct
32	Correct	3 ms	4320 KB	Output is correct
33	Correct	2 ms	4188 KB	Output is correct
34	Correct	2 ms	4380 KB	Output is correct
35	Correct	2 ms	4188 KB	Output is correct
36	Correct	2 ms	4188 KB	Output is correct
37	Correct	2 ms	4284 KB	Output is correct
38	Correct	2 ms	4184 KB	Output is correct
39	Correct	6 ms	6936 KB	Output is correct
40	Correct	4 ms	6940 KB	Output is correct
41	Correct	4 ms	6940 KB	Output is correct
42	Correct	5 ms	6944 KB	Output is correct
43	Correct	4 ms	6940 KB	Output is correct
44	Correct	4 ms	6940 KB	Output is correct
45	Correct	4 ms	6936 KB	Output is correct
46	Correct	5 ms	6968 KB	Output is correct
47	Correct	5 ms	6940 KB	Output is correct
48	Correct	4 ms	6940 KB	Output is correct
49	Correct	3 ms	6936 KB	Output is correct
50	Correct	3 ms	6776 KB	Output is correct
51	Correct	2 ms	4188 KB	Output is correct
52	Correct	2 ms	4188 KB	Output is correct
53	Correct	3 ms	4376 KB	Output is correct
54	Correct	2 ms	4328 KB	Output is correct
55	Correct	3 ms	4188 KB	Output is correct
56	Correct	2 ms	4184 KB	Output is correct
57	Correct	4 ms	4188 KB	Output is correct
58	Correct	2 ms	4188 KB	Output is correct
59	Correct	2 ms	4188 KB	Output is correct
60	Correct	4 ms	4188 KB	Output is correct
61	Correct	2 ms	4188 KB	Output is correct
62	Correct	3 ms	4188 KB	Output is correct
63	Correct	2 ms	4188 KB	Output is correct
64	Correct	3 ms	4188 KB	Output is correct
65	Correct	5 ms	6764 KB	Output is correct
66	Correct	4 ms	6880 KB	Output is correct
67	Correct	5 ms	6736 KB	Output is correct
68	Correct	4 ms	6940 KB	Output is correct
69	Correct	4 ms	6940 KB	Output is correct
70	Incorrect	71 ms	28132 KB	Output isn't correct
71	Halted	0 ms	0 KB	-

Submission #1027508

Compilation message

Subtask #1 14.0 / 14.0

Subtask #2 17.0 / 17.0

Subtask #3 9.0 / 9.0

Subtask #4 0 / 13.0

Subtask #5 0 / 21.0

Subtask #6 0 / 26.0

Subtask #1
14.0 / 14.0

Subtask #2
17.0 / 17.0

Subtask #3
9.0 / 9.0

Subtask #4
0 / 13.0

Subtask #5
0 / 21.0

Subtask #6
0 / 26.0