#include <bits/stdc++.h>
using namespace std;
const int N=1e5+5;
const int K=224;
const int MOD=1e9+7;
int n;
int d[N],x[N];
int dp[N],add[N][K];
int ans;
void norm(int &x){
if(x<0)x+=MOD;
if(x>=MOD)x-=MOD;
}
int main(){
cin.tie(nullptr)->sync_with_stdio(false);
cin >> n;
for(int i=1;i<=n;i++)cin >> d[i] >> x[i];
dp[1]=1;
for(int i=1;i<=n;i++){
for(int j=0;j<K;j++){
if(i-j>=0)norm(add[i][j]+=add[i-j][j]);
norm(dp[i]+=add[i][j]);
}
if(d[i]<K){
if(i+d[i]<=n)norm(add[i+d[i]][d[i]]+=dp[i]);
if(i+1LL*d[i]*(x[i]+1)<=n)norm(add[i+d[i]*(x[i]+1)][d[i]]-=dp[i]);
}else{
for(int j=1;j<=x[i]&&i+1LL*j*d[i]<=n;j++){
norm(dp[i+j*d[i]]+=dp[i]);
}
}
norm(ans+=dp[i]);
}
cout << ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
2392 KB |
Output is correct |
2 |
Correct |
0 ms |
2396 KB |
Output is correct |
3 |
Correct |
0 ms |
2396 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2396 KB |
Output is correct |
7 |
Correct |
0 ms |
2396 KB |
Output is correct |
8 |
Correct |
0 ms |
2396 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
0 ms |
2396 KB |
Output is correct |
11 |
Correct |
0 ms |
2396 KB |
Output is correct |
12 |
Correct |
0 ms |
2396 KB |
Output is correct |
13 |
Correct |
0 ms |
2396 KB |
Output is correct |
14 |
Correct |
0 ms |
2428 KB |
Output is correct |
15 |
Correct |
0 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
0 ms |
2396 KB |
Output is correct |
18 |
Correct |
0 ms |
2396 KB |
Output is correct |
19 |
Correct |
1 ms |
2396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
2392 KB |
Output is correct |
2 |
Correct |
0 ms |
2396 KB |
Output is correct |
3 |
Correct |
0 ms |
2396 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2396 KB |
Output is correct |
7 |
Correct |
0 ms |
2396 KB |
Output is correct |
8 |
Correct |
0 ms |
2396 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
0 ms |
2396 KB |
Output is correct |
11 |
Correct |
0 ms |
2396 KB |
Output is correct |
12 |
Correct |
0 ms |
2396 KB |
Output is correct |
13 |
Correct |
0 ms |
2396 KB |
Output is correct |
14 |
Correct |
0 ms |
2428 KB |
Output is correct |
15 |
Correct |
0 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
0 ms |
2396 KB |
Output is correct |
18 |
Correct |
0 ms |
2396 KB |
Output is correct |
19 |
Correct |
1 ms |
2396 KB |
Output is correct |
20 |
Correct |
8 ms |
9776 KB |
Output is correct |
21 |
Correct |
3 ms |
4956 KB |
Output is correct |
22 |
Correct |
9 ms |
11284 KB |
Output is correct |
23 |
Correct |
6 ms |
8028 KB |
Output is correct |
24 |
Correct |
4 ms |
5980 KB |
Output is correct |
25 |
Correct |
12 ms |
10332 KB |
Output is correct |
26 |
Correct |
5 ms |
6236 KB |
Output is correct |
27 |
Correct |
7 ms |
9884 KB |
Output is correct |
28 |
Correct |
8 ms |
11100 KB |
Output is correct |
29 |
Correct |
9 ms |
11100 KB |
Output is correct |
30 |
Correct |
9 ms |
11096 KB |
Output is correct |
31 |
Correct |
8 ms |
11236 KB |
Output is correct |
32 |
Correct |
9 ms |
11100 KB |
Output is correct |
33 |
Correct |
9 ms |
11100 KB |
Output is correct |
34 |
Correct |
10 ms |
11100 KB |
Output is correct |
35 |
Correct |
11 ms |
11144 KB |
Output is correct |
36 |
Correct |
16 ms |
11100 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
6 ms |
8168 KB |
Output is correct |
3 |
Correct |
4 ms |
6236 KB |
Output is correct |
4 |
Correct |
11 ms |
9820 KB |
Output is correct |
5 |
Correct |
56 ms |
70648 KB |
Output is correct |
6 |
Correct |
80 ms |
89160 KB |
Output is correct |
7 |
Correct |
83 ms |
89168 KB |
Output is correct |
8 |
Correct |
1 ms |
2396 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
0 ms |
2396 KB |
Output is correct |
11 |
Correct |
8 ms |
11100 KB |
Output is correct |
12 |
Correct |
80 ms |
89204 KB |
Output is correct |
13 |
Correct |
1 ms |
2392 KB |
Output is correct |
14 |
Correct |
7 ms |
11100 KB |
Output is correct |
15 |
Correct |
77 ms |
89100 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
50 ms |
44888 KB |
Output is correct |
2 |
Correct |
32 ms |
37508 KB |
Output is correct |
3 |
Correct |
77 ms |
89168 KB |
Output is correct |
4 |
Correct |
55 ms |
65368 KB |
Output is correct |
5 |
Correct |
1 ms |
2392 KB |
Output is correct |
6 |
Correct |
0 ms |
2396 KB |
Output is correct |
7 |
Correct |
8 ms |
11124 KB |
Output is correct |
8 |
Correct |
102 ms |
89172 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
2392 KB |
Output is correct |
2 |
Correct |
0 ms |
2396 KB |
Output is correct |
3 |
Correct |
0 ms |
2396 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2396 KB |
Output is correct |
7 |
Correct |
0 ms |
2396 KB |
Output is correct |
8 |
Correct |
0 ms |
2396 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
0 ms |
2396 KB |
Output is correct |
11 |
Correct |
0 ms |
2396 KB |
Output is correct |
12 |
Correct |
0 ms |
2396 KB |
Output is correct |
13 |
Correct |
0 ms |
2396 KB |
Output is correct |
14 |
Correct |
0 ms |
2428 KB |
Output is correct |
15 |
Correct |
0 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
0 ms |
2396 KB |
Output is correct |
18 |
Correct |
0 ms |
2396 KB |
Output is correct |
19 |
Correct |
1 ms |
2396 KB |
Output is correct |
20 |
Correct |
8 ms |
9776 KB |
Output is correct |
21 |
Correct |
3 ms |
4956 KB |
Output is correct |
22 |
Correct |
9 ms |
11284 KB |
Output is correct |
23 |
Correct |
6 ms |
8028 KB |
Output is correct |
24 |
Correct |
4 ms |
5980 KB |
Output is correct |
25 |
Correct |
12 ms |
10332 KB |
Output is correct |
26 |
Correct |
5 ms |
6236 KB |
Output is correct |
27 |
Correct |
7 ms |
9884 KB |
Output is correct |
28 |
Correct |
8 ms |
11100 KB |
Output is correct |
29 |
Correct |
9 ms |
11100 KB |
Output is correct |
30 |
Correct |
9 ms |
11096 KB |
Output is correct |
31 |
Correct |
8 ms |
11236 KB |
Output is correct |
32 |
Correct |
9 ms |
11100 KB |
Output is correct |
33 |
Correct |
9 ms |
11100 KB |
Output is correct |
34 |
Correct |
10 ms |
11100 KB |
Output is correct |
35 |
Correct |
11 ms |
11144 KB |
Output is correct |
36 |
Correct |
16 ms |
11100 KB |
Output is correct |
37 |
Correct |
1 ms |
2396 KB |
Output is correct |
38 |
Correct |
6 ms |
8168 KB |
Output is correct |
39 |
Correct |
4 ms |
6236 KB |
Output is correct |
40 |
Correct |
11 ms |
9820 KB |
Output is correct |
41 |
Correct |
56 ms |
70648 KB |
Output is correct |
42 |
Correct |
80 ms |
89160 KB |
Output is correct |
43 |
Correct |
83 ms |
89168 KB |
Output is correct |
44 |
Correct |
1 ms |
2396 KB |
Output is correct |
45 |
Correct |
1 ms |
2396 KB |
Output is correct |
46 |
Correct |
0 ms |
2396 KB |
Output is correct |
47 |
Correct |
8 ms |
11100 KB |
Output is correct |
48 |
Correct |
80 ms |
89204 KB |
Output is correct |
49 |
Correct |
1 ms |
2392 KB |
Output is correct |
50 |
Correct |
7 ms |
11100 KB |
Output is correct |
51 |
Correct |
77 ms |
89100 KB |
Output is correct |
52 |
Correct |
50 ms |
44888 KB |
Output is correct |
53 |
Correct |
32 ms |
37508 KB |
Output is correct |
54 |
Correct |
77 ms |
89168 KB |
Output is correct |
55 |
Correct |
55 ms |
65368 KB |
Output is correct |
56 |
Correct |
1 ms |
2392 KB |
Output is correct |
57 |
Correct |
0 ms |
2396 KB |
Output is correct |
58 |
Correct |
8 ms |
11124 KB |
Output is correct |
59 |
Correct |
102 ms |
89172 KB |
Output is correct |
60 |
Correct |
91 ms |
75752 KB |
Output is correct |
61 |
Correct |
98 ms |
89172 KB |
Output is correct |
62 |
Correct |
81 ms |
89172 KB |
Output is correct |
63 |
Correct |
80 ms |
89168 KB |
Output is correct |
64 |
Correct |
86 ms |
89128 KB |
Output is correct |
65 |
Correct |
139 ms |
89168 KB |
Output is correct |
66 |
Correct |
113 ms |
89196 KB |
Output is correct |
67 |
Correct |
89 ms |
89172 KB |
Output is correct |
68 |
Correct |
82 ms |
89140 KB |
Output is correct |
69 |
Correct |
122 ms |
89172 KB |
Output is correct |
70 |
Correct |
83 ms |
89096 KB |
Output is correct |
71 |
Correct |
81 ms |
89172 KB |
Output is correct |
72 |
Correct |
147 ms |
89172 KB |
Output is correct |