#include <bits/stdc++.h>
using namespace std;
const int md = 1e9 + 7;
int add(int a, int b) {
if (a + b < md) {
return a + b;
} else {
return a + b - md;
}
}
int sub(int a, int b) {
if (a >= b) {
return a - b;
} else {
return a - b + md;
}
}
void ckadd(int& a, int b) {
a = add(a, b);
}
void cksub(int& a, int b) {
a = sub(a, b);
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector<int> d(n), x(n);
for (int i = 0; i < n; i++) {
cin >> d[i] >> x[i];
}
const int B = 300;
vector<int> dp(n);
dp[0] = 1;
vector<vector<int>> sum(B, vector<int>(B));
vector<vector<array<int, 3>>> qs(n + 1);
for (int i = 0; i < n; i++) {
for (auto p : qs[i]) {
cksub(sum[p[0]][p[1]], p[2]);
}
for (int j = 1; j < B; j++) {
ckadd(dp[i], sum[j][i % j]);
}
if (d[i] == 0) {
continue;
}
if (d[i] < B) {
ckadd(sum[d[i]][i % d[i]], dp[i]);
qs[min((long long) n, i + d[i] * 1ll * x[i] + 1)].push_back({d[i], i % d[i], dp[i]});
} else {
for (int j = 1; j <= x[i] && i + j * d[i] < n; j++) {
ckadd(dp[i + j * d[i]], dp[i]);
}
}
}
int res = 0;
for (int i = 0; i < n; i++) {
ckadd(res, dp[i]);
}
cout << res << '\n';
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
0 ms |
604 KB |
Output is correct |
3 |
Correct |
0 ms |
600 KB |
Output is correct |
4 |
Correct |
0 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
604 KB |
Output is correct |
6 |
Correct |
0 ms |
600 KB |
Output is correct |
7 |
Correct |
1 ms |
600 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
1 ms |
600 KB |
Output is correct |
10 |
Correct |
0 ms |
604 KB |
Output is correct |
11 |
Correct |
0 ms |
604 KB |
Output is correct |
12 |
Correct |
0 ms |
604 KB |
Output is correct |
13 |
Correct |
1 ms |
604 KB |
Output is correct |
14 |
Correct |
0 ms |
604 KB |
Output is correct |
15 |
Correct |
1 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
604 KB |
Output is correct |
17 |
Correct |
0 ms |
600 KB |
Output is correct |
18 |
Correct |
0 ms |
604 KB |
Output is correct |
19 |
Correct |
0 ms |
604 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
0 ms |
604 KB |
Output is correct |
3 |
Correct |
0 ms |
600 KB |
Output is correct |
4 |
Correct |
0 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
604 KB |
Output is correct |
6 |
Correct |
0 ms |
600 KB |
Output is correct |
7 |
Correct |
1 ms |
600 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
1 ms |
600 KB |
Output is correct |
10 |
Correct |
0 ms |
604 KB |
Output is correct |
11 |
Correct |
0 ms |
604 KB |
Output is correct |
12 |
Correct |
0 ms |
604 KB |
Output is correct |
13 |
Correct |
1 ms |
604 KB |
Output is correct |
14 |
Correct |
0 ms |
604 KB |
Output is correct |
15 |
Correct |
1 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
604 KB |
Output is correct |
17 |
Correct |
0 ms |
600 KB |
Output is correct |
18 |
Correct |
0 ms |
604 KB |
Output is correct |
19 |
Correct |
0 ms |
604 KB |
Output is correct |
20 |
Correct |
7 ms |
1176 KB |
Output is correct |
21 |
Correct |
3 ms |
856 KB |
Output is correct |
22 |
Correct |
8 ms |
1116 KB |
Output is correct |
23 |
Correct |
5 ms |
1112 KB |
Output is correct |
24 |
Correct |
4 ms |
860 KB |
Output is correct |
25 |
Correct |
7 ms |
1372 KB |
Output is correct |
26 |
Correct |
4 ms |
1116 KB |
Output is correct |
27 |
Correct |
8 ms |
1372 KB |
Output is correct |
28 |
Correct |
8 ms |
1372 KB |
Output is correct |
29 |
Correct |
9 ms |
1308 KB |
Output is correct |
30 |
Correct |
8 ms |
1048 KB |
Output is correct |
31 |
Correct |
8 ms |
1112 KB |
Output is correct |
32 |
Correct |
9 ms |
1372 KB |
Output is correct |
33 |
Correct |
9 ms |
1372 KB |
Output is correct |
34 |
Correct |
8 ms |
1188 KB |
Output is correct |
35 |
Correct |
8 ms |
1116 KB |
Output is correct |
36 |
Correct |
8 ms |
1372 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
604 KB |
Output is correct |
2 |
Correct |
6 ms |
996 KB |
Output is correct |
3 |
Correct |
4 ms |
1116 KB |
Output is correct |
4 |
Correct |
7 ms |
1372 KB |
Output is correct |
5 |
Correct |
64 ms |
5140 KB |
Output is correct |
6 |
Correct |
81 ms |
6092 KB |
Output is correct |
7 |
Correct |
81 ms |
6100 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
0 ms |
604 KB |
Output is correct |
10 |
Correct |
0 ms |
604 KB |
Output is correct |
11 |
Correct |
9 ms |
1372 KB |
Output is correct |
12 |
Correct |
84 ms |
5836 KB |
Output is correct |
13 |
Correct |
0 ms |
604 KB |
Output is correct |
14 |
Correct |
9 ms |
1428 KB |
Output is correct |
15 |
Correct |
80 ms |
5856 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
40 ms |
3404 KB |
Output is correct |
2 |
Correct |
32 ms |
2896 KB |
Output is correct |
3 |
Correct |
91 ms |
5992 KB |
Output is correct |
4 |
Correct |
57 ms |
4808 KB |
Output is correct |
5 |
Correct |
0 ms |
600 KB |
Output is correct |
6 |
Correct |
0 ms |
604 KB |
Output is correct |
7 |
Correct |
9 ms |
1368 KB |
Output is correct |
8 |
Correct |
79 ms |
5836 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
0 ms |
604 KB |
Output is correct |
3 |
Correct |
0 ms |
600 KB |
Output is correct |
4 |
Correct |
0 ms |
604 KB |
Output is correct |
5 |
Correct |
0 ms |
604 KB |
Output is correct |
6 |
Correct |
0 ms |
600 KB |
Output is correct |
7 |
Correct |
1 ms |
600 KB |
Output is correct |
8 |
Correct |
0 ms |
604 KB |
Output is correct |
9 |
Correct |
1 ms |
600 KB |
Output is correct |
10 |
Correct |
0 ms |
604 KB |
Output is correct |
11 |
Correct |
0 ms |
604 KB |
Output is correct |
12 |
Correct |
0 ms |
604 KB |
Output is correct |
13 |
Correct |
1 ms |
604 KB |
Output is correct |
14 |
Correct |
0 ms |
604 KB |
Output is correct |
15 |
Correct |
1 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
604 KB |
Output is correct |
17 |
Correct |
0 ms |
600 KB |
Output is correct |
18 |
Correct |
0 ms |
604 KB |
Output is correct |
19 |
Correct |
0 ms |
604 KB |
Output is correct |
20 |
Correct |
7 ms |
1176 KB |
Output is correct |
21 |
Correct |
3 ms |
856 KB |
Output is correct |
22 |
Correct |
8 ms |
1116 KB |
Output is correct |
23 |
Correct |
5 ms |
1112 KB |
Output is correct |
24 |
Correct |
4 ms |
860 KB |
Output is correct |
25 |
Correct |
7 ms |
1372 KB |
Output is correct |
26 |
Correct |
4 ms |
1116 KB |
Output is correct |
27 |
Correct |
8 ms |
1372 KB |
Output is correct |
28 |
Correct |
8 ms |
1372 KB |
Output is correct |
29 |
Correct |
9 ms |
1308 KB |
Output is correct |
30 |
Correct |
8 ms |
1048 KB |
Output is correct |
31 |
Correct |
8 ms |
1112 KB |
Output is correct |
32 |
Correct |
9 ms |
1372 KB |
Output is correct |
33 |
Correct |
9 ms |
1372 KB |
Output is correct |
34 |
Correct |
8 ms |
1188 KB |
Output is correct |
35 |
Correct |
8 ms |
1116 KB |
Output is correct |
36 |
Correct |
8 ms |
1372 KB |
Output is correct |
37 |
Correct |
0 ms |
604 KB |
Output is correct |
38 |
Correct |
6 ms |
996 KB |
Output is correct |
39 |
Correct |
4 ms |
1116 KB |
Output is correct |
40 |
Correct |
7 ms |
1372 KB |
Output is correct |
41 |
Correct |
64 ms |
5140 KB |
Output is correct |
42 |
Correct |
81 ms |
6092 KB |
Output is correct |
43 |
Correct |
81 ms |
6100 KB |
Output is correct |
44 |
Correct |
0 ms |
604 KB |
Output is correct |
45 |
Correct |
0 ms |
604 KB |
Output is correct |
46 |
Correct |
0 ms |
604 KB |
Output is correct |
47 |
Correct |
9 ms |
1372 KB |
Output is correct |
48 |
Correct |
84 ms |
5836 KB |
Output is correct |
49 |
Correct |
0 ms |
604 KB |
Output is correct |
50 |
Correct |
9 ms |
1428 KB |
Output is correct |
51 |
Correct |
80 ms |
5856 KB |
Output is correct |
52 |
Correct |
40 ms |
3404 KB |
Output is correct |
53 |
Correct |
32 ms |
2896 KB |
Output is correct |
54 |
Correct |
91 ms |
5992 KB |
Output is correct |
55 |
Correct |
57 ms |
4808 KB |
Output is correct |
56 |
Correct |
0 ms |
600 KB |
Output is correct |
57 |
Correct |
0 ms |
604 KB |
Output is correct |
58 |
Correct |
9 ms |
1368 KB |
Output is correct |
59 |
Correct |
79 ms |
5836 KB |
Output is correct |
60 |
Correct |
67 ms |
5352 KB |
Output is correct |
61 |
Correct |
79 ms |
5832 KB |
Output is correct |
62 |
Correct |
83 ms |
6480 KB |
Output is correct |
63 |
Correct |
77 ms |
5836 KB |
Output is correct |
64 |
Correct |
83 ms |
4188 KB |
Output is correct |
65 |
Correct |
90 ms |
4700 KB |
Output is correct |
66 |
Correct |
78 ms |
5840 KB |
Output is correct |
67 |
Correct |
79 ms |
4344 KB |
Output is correct |
68 |
Correct |
79 ms |
5220 KB |
Output is correct |
69 |
Correct |
95 ms |
6260 KB |
Output is correct |
70 |
Correct |
87 ms |
4188 KB |
Output is correct |
71 |
Correct |
78 ms |
4184 KB |
Output is correct |
72 |
Correct |
80 ms |
5960 KB |
Output is correct |