Submission #1057171

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1057171	2024-08-13T14:42:15 Z	0npata	Trains (BOI24_trains)	C++17	100 / 100	452 ms	791088 KB

Main

#include<bits/stdc++.h>
using namespace std;

#define int long long
#define vec vector

const int MOD = 1e9 + 7;
const int SQN = 1000;


int32_t main() {
	int N;
	cin >> N;
	vec<int> D(N), X(N);

	for(int i = 0; i<N; i++) {
		cin >> D[i];
		cin >> X[i];
	}


	vec<int> f(N, 1);
	vec<vec<int>> fsum(N, vec<int>(SQN, 1));

	for(int i = N-2; i>=0; i--) {
		if(D[i] == 0) {}
		else if(D[i] >= SQN) {
			for(int j = 1; j<=X[i] && i+(j*D[i]) < N; j++) {
				f[i] += f[i+(j*D[i])];

				f[i] %= MOD;
				assert(i+(j*D[i]) < N);
			}
		}
		else {
			f[i] += ((i+D[i]) < N ? fsum[i+D[i]][D[i]] : 0ll) + MOD - (i+(X[i]+1)*D[i] < N ? fsum[i+(X[i]+1)*D[i]][D[i]] : 0ll);
			f[i] %= MOD;
		}

		for(int j = 1; j<SQN; j++) {
			fsum[i][j] = f[i] + ((i+j) < N ? fsum[i+j][j] : 0);
		}

	}

	cout << f[0] << '\n';

}

Subtask #1
8.0 / 8.0

#	Verdict	Memory	Grader output
1	Correct	348 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Correct	348 KB	Output is correct
5	Correct	348 KB	Output is correct
6	Correct	348 KB	Output is correct
7	Correct	348 KB	Output is correct
8	Correct	348 KB	Output is correct
9	Correct	348 KB	Output is correct
10	Correct	348 KB	Output is correct
11	Correct	348 KB	Output is correct
12	Correct	348 KB	Output is correct
13	Correct	348 KB	Output is correct
14	Correct	348 KB	Output is correct
15	Correct	348 KB	Output is correct
16	Correct	348 KB	Output is correct
17	Correct	348 KB	Output is correct
18	Correct	348 KB	Output is correct
19	Correct	348 KB	Output is correct

Subtask #2
13.0 / 13.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	37 ms	65840 KB	Output is correct
21	Correct	14 ms	23640 KB	Output is correct
22	Correct	43 ms	79216 KB	Output is correct
23	Correct	26 ms	51288 KB	Output is correct
24	Correct	18 ms	32604 KB	Output is correct
25	Correct	39 ms	70980 KB	Output is correct
26	Correct	19 ms	35676 KB	Output is correct
27	Correct	36 ms	67836 KB	Output is correct
28	Correct	45 ms	79196 KB	Output is correct
29	Correct	44 ms	79340 KB	Output is correct
30	Correct	45 ms	79196 KB	Output is correct
31	Correct	44 ms	79184 KB	Output is correct
32	Correct	46 ms	79340 KB	Output is correct
33	Correct	44 ms	79188 KB	Output is correct
34	Correct	43 ms	79196 KB	Output is correct
35	Correct	43 ms	79196 KB	Output is correct
36	Correct	42 ms	79340 KB	Output is correct

Subtask #3
16.0 / 16.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	27 ms	51524 KB	Output is correct
3	Correct	19 ms	35672 KB	Output is correct
4	Correct	37 ms	67676 KB	Output is correct
5	Correct	348 ms	610128 KB	Output is correct
6	Correct	428 ms	789476 KB	Output is correct
7	Correct	420 ms	790352 KB	Output is correct
8	Correct	1 ms	344 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	42 ms	79360 KB	Output is correct
12	Correct	430 ms	790612 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	44 ms	79460 KB	Output is correct
15	Correct	429 ms	790856 KB	Output is correct

Subtask #4
34.0 / 34.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	203 ms	380244 KB	Output is correct
2	Correct	171 ms	315988 KB	Output is correct
3	Correct	432 ms	789424 KB	Output is correct
4	Correct	320 ms	566352 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	45 ms	79288 KB	Output is correct
8	Correct	441 ms	790864 KB	Output is correct

Subtask #5
29.0 / 29.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	348 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	348 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	0 ms	348 KB	Output is correct
20	Correct	37 ms	65840 KB	Output is correct
21	Correct	14 ms	23640 KB	Output is correct
22	Correct	43 ms	79216 KB	Output is correct
23	Correct	26 ms	51288 KB	Output is correct
24	Correct	18 ms	32604 KB	Output is correct
25	Correct	39 ms	70980 KB	Output is correct
26	Correct	19 ms	35676 KB	Output is correct
27	Correct	36 ms	67836 KB	Output is correct
28	Correct	45 ms	79196 KB	Output is correct
29	Correct	44 ms	79340 KB	Output is correct
30	Correct	45 ms	79196 KB	Output is correct
31	Correct	44 ms	79184 KB	Output is correct
32	Correct	46 ms	79340 KB	Output is correct
33	Correct	44 ms	79188 KB	Output is correct
34	Correct	43 ms	79196 KB	Output is correct
35	Correct	43 ms	79196 KB	Output is correct
36	Correct	42 ms	79340 KB	Output is correct
37	Correct	0 ms	348 KB	Output is correct
38	Correct	27 ms	51524 KB	Output is correct
39	Correct	19 ms	35672 KB	Output is correct
40	Correct	37 ms	67676 KB	Output is correct
41	Correct	348 ms	610128 KB	Output is correct
42	Correct	428 ms	789476 KB	Output is correct
43	Correct	420 ms	790352 KB	Output is correct
44	Correct	1 ms	344 KB	Output is correct
45	Correct	0 ms	348 KB	Output is correct
46	Correct	0 ms	348 KB	Output is correct
47	Correct	42 ms	79360 KB	Output is correct
48	Correct	430 ms	790612 KB	Output is correct
49	Correct	0 ms	348 KB	Output is correct
50	Correct	44 ms	79460 KB	Output is correct
51	Correct	429 ms	790856 KB	Output is correct
52	Correct	203 ms	380244 KB	Output is correct
53	Correct	171 ms	315988 KB	Output is correct
54	Correct	432 ms	789424 KB	Output is correct
55	Correct	320 ms	566352 KB	Output is correct
56	Correct	0 ms	348 KB	Output is correct
57	Correct	0 ms	348 KB	Output is correct
58	Correct	45 ms	79288 KB	Output is correct
59	Correct	441 ms	790864 KB	Output is correct
60	Correct	370 ms	658512 KB	Output is correct
61	Correct	437 ms	790276 KB	Output is correct
62	Correct	450 ms	789844 KB	Output is correct
63	Correct	415 ms	790340 KB	Output is correct
64	Correct	435 ms	791088 KB	Output is correct
65	Correct	452 ms	790608 KB	Output is correct
66	Correct	423 ms	790612 KB	Output is correct
67	Correct	444 ms	790864 KB	Output is correct
68	Correct	425 ms	790616 KB	Output is correct
69	Correct	447 ms	790100 KB	Output is correct
70	Correct	425 ms	790608 KB	Output is correct
71	Correct	424 ms	790232 KB	Output is correct
72	Correct	432 ms	790356 KB	Output is correct

Submission #1057171

Compilation message

Subtask #1 8.0 / 8.0

Subtask #2 13.0 / 13.0

Subtask #3 16.0 / 16.0

Subtask #4 34.0 / 34.0

Subtask #5 29.0 / 29.0

Subtask #1
8.0 / 8.0

Subtask #2
13.0 / 13.0

Subtask #3
16.0 / 16.0

Subtask #4
34.0 / 34.0

Subtask #5
29.0 / 29.0