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Submission #1111441

# Submission time Handle Problem Language Result Execution time Memory
1111441 2024-11-12T08:31:07 Z siewjh Fire (BOI24_fire) C++17
100 / 100
 88 ms 19932 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 200005;
int p[MAXN][20];
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	memset(p, -1, sizeof(p));
	int nums, len; cin >> nums >> len;
	vector<pair<int, int>> pv(nums);
	for (int i = 0; i < nums; i++){
		int a, b; cin >> a >> b;
		if (a > b) b += len;
		pv[i] = {a, b};
	}
	sort(pv.begin(), pv.end());
	for (int i = 0, pid = 0, fid, far = 0; i < nums; i++){
		int a, b; tie(a, b) = pv[i];
		for(; pid != nums && pv[pid].first <= b; pid++){
			int nb = pv[pid].second;
			if (nb > far){
				far = nb; fid = pid;
			}
		}
		if (far > b) p[i][0] = fid;
	}
	for (int k = 1; k <= 19; k++)
		for (int i = 0; i < nums; i++){
			if (p[i][k - 1] == -1) p[i][k] = -1;
			else p[i][k] = p[p[i][k - 1]][k - 1];
		}
	int ans = MAXN;
	for (int i = 0; i < nums; i++){
		int a, b, curr = i, res = 2; tie(a, b) = pv[i];
		for (int k = 19; k >= 0; k--){
			int nxt = p[curr][k];
			if (nxt != -1 && pv[nxt].second < a + len){
				curr = nxt; res += (1 << k);
			}
		}
		curr = p[curr][0];
		if (curr != -1 && pv[curr].second >= a + len) ans = min(ans, res);
	}
	cout << (ans == MAXN ? -1 : ans);
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:25:24: warning: 'fid' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |   if (far > b) p[i][0] = fid;
      |                ~~~~~~~~^~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 15952 KB Output is correct
2 Correct 3 ms 15900 KB Output is correct
3 Correct 3 ms 15904 KB Output is correct
4 Correct 4 ms 16120 KB Output is correct
5 Correct 4 ms 15952 KB Output is correct
6 Correct 4 ms 15964 KB Output is correct
7 Correct 4 ms 15952 KB Output is correct
8 Correct 4 ms 15952 KB Output is correct
9 Correct 3 ms 15952 KB Output is correct
10 Correct 4 ms 15952 KB Output is correct
11 Correct 4 ms 15952 KB Output is correct
12 Correct 3 ms 15880 KB Output is correct
13 Correct 3 ms 15952 KB Output is correct
14 Correct 3 ms 16176 KB Output is correct
15 Correct 4 ms 15952 KB Output is correct
16 Correct 5 ms 15952 KB Output is correct
17 Correct 4 ms 15952 KB Output is correct
18 Correct 5 ms 15952 KB Output is correct
19 Correct 3 ms 15952 KB Output is correct
20 Correct 3 ms 15952 KB Output is correct
21 Correct 3 ms 15952 KB Output is correct
22 Correct 5 ms 15964 KB Output is correct
23 Correct 4 ms 16024 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 15952 KB Output is correct
2 Correct 3 ms 15900 KB Output is correct
3 Correct 3 ms 15904 KB Output is correct
4 Correct 4 ms 16120 KB Output is correct
5 Correct 4 ms 15952 KB Output is correct
6 Correct 4 ms 15964 KB Output is correct
7 Correct 4 ms 15952 KB Output is correct
8 Correct 4 ms 15952 KB Output is correct
9 Correct 3 ms 15952 KB Output is correct
10 Correct 4 ms 15952 KB Output is correct
11 Correct 4 ms 15952 KB Output is correct
12 Correct 3 ms 15880 KB Output is correct
13 Correct 3 ms 15952 KB Output is correct
14 Correct 3 ms 16176 KB Output is correct
15 Correct 4 ms 15952 KB Output is correct
16 Correct 5 ms 15952 KB Output is correct
17 Correct 4 ms 15952 KB Output is correct
18 Correct 5 ms 15952 KB Output is correct
19 Correct 3 ms 15952 KB Output is correct
20 Correct 3 ms 15952 KB Output is correct
21 Correct 3 ms 15952 KB Output is correct
22 Correct 5 ms 15964 KB Output is correct
23 Correct 4 ms 16024 KB Output is correct
24 Correct 4 ms 15952 KB Output is correct
25 Correct 3 ms 16132 KB Output is correct
26 Correct 3 ms 15984 KB Output is correct
27 Correct 4 ms 16028 KB Output is correct
28 Correct 4 ms 15952 KB Output is correct
29 Correct 4 ms 16052 KB Output is correct
30 Correct 3 ms 15952 KB Output is correct
31 Correct 4 ms 15952 KB Output is correct
32 Correct 4 ms 15952 KB Output is correct
33 Correct 3 ms 15952 KB Output is correct
34 Correct 3 ms 15952 KB Output is correct
35 Correct 3 ms 15952 KB Output is correct
36 Correct 3 ms 15952 KB Output is correct
37 Correct 4 ms 15952 KB Output is correct
38 Correct 3 ms 16120 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 15952 KB Output is correct
2 Correct 3 ms 15900 KB Output is correct
3 Correct 3 ms 15904 KB Output is correct
4 Correct 4 ms 16120 KB Output is correct
5 Correct 4 ms 15952 KB Output is correct
6 Correct 4 ms 15964 KB Output is correct
7 Correct 4 ms 15952 KB Output is correct
8 Correct 4 ms 15952 KB Output is correct
9 Correct 3 ms 15952 KB Output is correct
10 Correct 4 ms 15952 KB Output is correct
11 Correct 4 ms 15952 KB Output is correct
12 Correct 3 ms 15880 KB Output is correct
13 Correct 3 ms 15952 KB Output is correct
14 Correct 3 ms 16176 KB Output is correct
15 Correct 4 ms 15952 KB Output is correct
16 Correct 5 ms 15952 KB Output is correct
17 Correct 4 ms 15952 KB Output is correct
18 Correct 5 ms 15952 KB Output is correct
19 Correct 3 ms 15952 KB Output is correct
20 Correct 3 ms 15952 KB Output is correct
21 Correct 3 ms 15952 KB Output is correct
22 Correct 5 ms 15964 KB Output is correct
23 Correct 4 ms 16024 KB Output is correct
24 Correct 4 ms 15952 KB Output is correct
25 Correct 3 ms 16132 KB Output is correct
26 Correct 3 ms 15984 KB Output is correct
27 Correct 4 ms 16028 KB Output is correct
28 Correct 4 ms 15952 KB Output is correct
29 Correct 4 ms 16052 KB Output is correct
30 Correct 3 ms 15952 KB Output is correct
31 Correct 4 ms 15952 KB Output is correct
32 Correct 4 ms 15952 KB Output is correct
33 Correct 3 ms 15952 KB Output is correct
34 Correct 3 ms 15952 KB Output is correct
35 Correct 3 ms 15952 KB Output is correct
36 Correct 3 ms 15952 KB Output is correct
37 Correct 4 ms 15952 KB Output is correct
38 Correct 3 ms 16120 KB Output is correct
39 Correct 5 ms 16136 KB Output is correct
40 Correct 5 ms 15956 KB Output is correct
41 Correct 6 ms 15972 KB Output is correct
42 Correct 6 ms 16208 KB Output is correct
43 Correct 5 ms 15952 KB Output is correct
44 Correct 5 ms 15952 KB Output is correct
45 Correct 4 ms 15952 KB Output is correct
46 Correct 5 ms 16208 KB Output is correct
47 Correct 5 ms 16024 KB Output is correct
48 Correct 6 ms 16256 KB Output is correct
49 Correct 4 ms 16208 KB Output is correct
50 Correct 4 ms 15952 KB Output is correct

Subtask #4
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 15952 KB Output is correct
2 Correct 3 ms 15952 KB Output is correct
3 Correct 3 ms 15952 KB Output is correct
4 Correct 4 ms 16120 KB Output is correct
5 Correct 4 ms 15952 KB Output is correct
6 Correct 4 ms 16124 KB Output is correct
7 Correct 3 ms 15952 KB Output is correct
8 Correct 3 ms 15952 KB Output is correct
9 Correct 3 ms 15952 KB Output is correct
10 Correct 3 ms 15952 KB Output is correct
11 Correct 4 ms 15952 KB Output is correct
12 Correct 3 ms 15952 KB Output is correct
13 Correct 3 ms 15952 KB Output is correct
14 Correct 3 ms 16108 KB Output is correct
15 Correct 5 ms 16208 KB Output is correct
16 Correct 4 ms 15952 KB Output is correct
17 Correct 4 ms 16208 KB Output is correct
18 Correct 4 ms 16208 KB Output is correct
19 Correct 4 ms 15952 KB Output is correct
20 Correct 35 ms 17604 KB Output is correct
21 Correct 60 ms 17488 KB Output is correct
22 Correct 62 ms 17488 KB Output is correct
23 Correct 58 ms 17488 KB Output is correct
24 Correct 70 ms 17488 KB Output is correct
25 Correct 51 ms 17488 KB Output is correct
26 Correct 66 ms 17488 KB Output is correct
27 Correct 75 ms 17488 KB Output is correct
28 Correct 58 ms 17488 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 15952 KB Output is correct
2 Correct 3 ms 15952 KB Output is correct
3 Correct 3 ms 15952 KB Output is correct
4 Correct 3 ms 15952 KB Output is correct
5 Correct 4 ms 15952 KB Output is correct
6 Correct 3 ms 15952 KB Output is correct
7 Correct 3 ms 15952 KB Output is correct
8 Correct 3 ms 15952 KB Output is correct
9 Correct 3 ms 15952 KB Output is correct
10 Correct 4 ms 15952 KB Output is correct
11 Correct 3 ms 15952 KB Output is correct
12 Correct 5 ms 15952 KB Output is correct
13 Correct 6 ms 15952 KB Output is correct
14 Correct 4 ms 16208 KB Output is correct
15 Correct 33 ms 17488 KB Output is correct
16 Correct 75 ms 17500 KB Output is correct
17 Correct 59 ms 17488 KB Output is correct
18 Correct 64 ms 19852 KB Output is correct
19 Correct 66 ms 17488 KB Output is correct
20 Correct 56 ms 17488 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 15952 KB Output is correct
2 Correct 3 ms 15900 KB Output is correct
3 Correct 3 ms 15904 KB Output is correct
4 Correct 4 ms 16120 KB Output is correct
5 Correct 4 ms 15952 KB Output is correct
6 Correct 4 ms 15964 KB Output is correct
7 Correct 4 ms 15952 KB Output is correct
8 Correct 4 ms 15952 KB Output is correct
9 Correct 3 ms 15952 KB Output is correct
10 Correct 4 ms 15952 KB Output is correct
11 Correct 4 ms 15952 KB Output is correct
12 Correct 3 ms 15880 KB Output is correct
13 Correct 3 ms 15952 KB Output is correct
14 Correct 3 ms 16176 KB Output is correct
15 Correct 4 ms 15952 KB Output is correct
16 Correct 5 ms 15952 KB Output is correct
17 Correct 4 ms 15952 KB Output is correct
18 Correct 5 ms 15952 KB Output is correct
19 Correct 3 ms 15952 KB Output is correct
20 Correct 3 ms 15952 KB Output is correct
21 Correct 3 ms 15952 KB Output is correct
22 Correct 5 ms 15964 KB Output is correct
23 Correct 4 ms 16024 KB Output is correct
24 Correct 4 ms 15952 KB Output is correct
25 Correct 3 ms 16132 KB Output is correct
26 Correct 3 ms 15984 KB Output is correct
27 Correct 4 ms 16028 KB Output is correct
28 Correct 4 ms 15952 KB Output is correct
29 Correct 4 ms 16052 KB Output is correct
30 Correct 3 ms 15952 KB Output is correct
31 Correct 4 ms 15952 KB Output is correct
32 Correct 4 ms 15952 KB Output is correct
33 Correct 3 ms 15952 KB Output is correct
34 Correct 3 ms 15952 KB Output is correct
35 Correct 3 ms 15952 KB Output is correct
36 Correct 3 ms 15952 KB Output is correct
37 Correct 4 ms 15952 KB Output is correct
38 Correct 3 ms 16120 KB Output is correct
39 Correct 5 ms 16136 KB Output is correct
40 Correct 5 ms 15956 KB Output is correct
41 Correct 6 ms 15972 KB Output is correct
42 Correct 6 ms 16208 KB Output is correct
43 Correct 5 ms 15952 KB Output is correct
44 Correct 5 ms 15952 KB Output is correct
45 Correct 4 ms 15952 KB Output is correct
46 Correct 5 ms 16208 KB Output is correct
47 Correct 5 ms 16024 KB Output is correct
48 Correct 6 ms 16256 KB Output is correct
49 Correct 4 ms 16208 KB Output is correct
50 Correct 4 ms 15952 KB Output is correct
51 Correct 3 ms 15952 KB Output is correct
52 Correct 3 ms 15952 KB Output is correct
53 Correct 3 ms 15952 KB Output is correct
54 Correct 4 ms 16120 KB Output is correct
55 Correct 4 ms 15952 KB Output is correct
56 Correct 4 ms 16124 KB Output is correct
57 Correct 3 ms 15952 KB Output is correct
58 Correct 3 ms 15952 KB Output is correct
59 Correct 3 ms 15952 KB Output is correct
60 Correct 3 ms 15952 KB Output is correct
61 Correct 4 ms 15952 KB Output is correct
62 Correct 3 ms 15952 KB Output is correct
63 Correct 3 ms 15952 KB Output is correct
64 Correct 3 ms 16108 KB Output is correct
65 Correct 5 ms 16208 KB Output is correct
66 Correct 4 ms 15952 KB Output is correct
67 Correct 4 ms 16208 KB Output is correct
68 Correct 4 ms 16208 KB Output is correct
69 Correct 4 ms 15952 KB Output is correct
70 Correct 35 ms 17604 KB Output is correct
71 Correct 60 ms 17488 KB Output is correct
72 Correct 62 ms 17488 KB Output is correct
73 Correct 58 ms 17488 KB Output is correct
74 Correct 70 ms 17488 KB Output is correct
75 Correct 51 ms 17488 KB Output is correct
76 Correct 66 ms 17488 KB Output is correct
77 Correct 75 ms 17488 KB Output is correct
78 Correct 58 ms 17488 KB Output is correct
79 Correct 4 ms 15952 KB Output is correct
80 Correct 3 ms 15952 KB Output is correct
81 Correct 3 ms 15952 KB Output is correct
82 Correct 3 ms 15952 KB Output is correct
83 Correct 4 ms 15952 KB Output is correct
84 Correct 3 ms 15952 KB Output is correct
85 Correct 3 ms 15952 KB Output is correct
86 Correct 3 ms 15952 KB Output is correct
87 Correct 3 ms 15952 KB Output is correct
88 Correct 4 ms 15952 KB Output is correct
89 Correct 3 ms 15952 KB Output is correct
90 Correct 5 ms 15952 KB Output is correct
91 Correct 6 ms 15952 KB Output is correct
92 Correct 4 ms 16208 KB Output is correct
93 Correct 33 ms 17488 KB Output is correct
94 Correct 75 ms 17500 KB Output is correct
95 Correct 59 ms 17488 KB Output is correct
96 Correct 64 ms 19852 KB Output is correct
97 Correct 66 ms 17488 KB Output is correct
98 Correct 56 ms 17488 KB Output is correct
99 Correct 62 ms 19784 KB Output is correct
100 Correct 60 ms 19932 KB Output is correct
101 Correct 70 ms 17500 KB Output is correct
102 Correct 68 ms 19744 KB Output is correct
103 Correct 88 ms 17488 KB Output is correct
104 Correct 57 ms 17488 KB Output is correct
105 Correct 50 ms 17488 KB Output is correct