#include <bits/stdc++.h>
using namespace std;
#define int long long
const long long buc=316,mod=1000000007;
int32_t main(){
ios::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
pair<long long,long long> arr[n+1];
for(int i=1; i<=n; i++) cin >> arr[i].first >> arr[i].second;
long long dp[n+1];
memset(dp,0,sizeof(dp));
dp[1]=1;
long long smol[buc+5][buc+5]; //div, rem
memset(smol,0,sizeof(smol));
vector<pair<int,long long> > stop[n+1];
long long ans=0;
for(int i=1; i<=n; i++){
for(int j=1; j<buc; j++){
dp[i]+=smol[j][i%j];
dp[i]%=mod;
}
ans+=dp[i];
ans%=mod;
for(auto j:stop[i]){
smol[j.first][i%j.first]-=j.second;
smol[j.first][i%j.first]%=mod;
if(smol[j.first][i%j.first]<0) smol[j.first][i%j.first]+=mod;
}
if(arr[i].first==0||arr[i].second==0) continue;
else if(arr[i].first<buc){
smol[arr[i].first][i%arr[i].first]+=dp[i];
smol[arr[i].first][i%arr[i].first]%=mod;
if(i+arr[i].first*arr[i].second<=n){
stop[i+arr[i].first*arr[i].second].push_back({arr[i].first,dp[i]});
}
}
else{
for(int j=1; j<=arr[i].second; j++){
if(i+j*arr[i].first>n) break;
dp[i+j*arr[i].first]+=dp[i];
dp[i+j*arr[i].first]%=mod;
}
}
}
cout << ans;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
1116 KB |
Output is correct |
2 |
Correct |
1 ms |
1116 KB |
Output is correct |
3 |
Correct |
1 ms |
1116 KB |
Output is correct |
4 |
Correct |
0 ms |
1116 KB |
Output is correct |
5 |
Correct |
1 ms |
1116 KB |
Output is correct |
6 |
Correct |
1 ms |
1116 KB |
Output is correct |
7 |
Correct |
1 ms |
1116 KB |
Output is correct |
8 |
Correct |
1 ms |
1128 KB |
Output is correct |
9 |
Correct |
1 ms |
1112 KB |
Output is correct |
10 |
Correct |
1 ms |
1116 KB |
Output is correct |
11 |
Correct |
1 ms |
1116 KB |
Output is correct |
12 |
Correct |
1 ms |
1116 KB |
Output is correct |
13 |
Correct |
1 ms |
1116 KB |
Output is correct |
14 |
Correct |
1 ms |
1116 KB |
Output is correct |
15 |
Correct |
1 ms |
1116 KB |
Output is correct |
16 |
Correct |
1 ms |
1116 KB |
Output is correct |
17 |
Correct |
1 ms |
1112 KB |
Output is correct |
18 |
Correct |
1 ms |
1116 KB |
Output is correct |
19 |
Correct |
1 ms |
1116 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
1116 KB |
Output is correct |
2 |
Correct |
1 ms |
1116 KB |
Output is correct |
3 |
Correct |
1 ms |
1116 KB |
Output is correct |
4 |
Correct |
0 ms |
1116 KB |
Output is correct |
5 |
Correct |
1 ms |
1116 KB |
Output is correct |
6 |
Correct |
1 ms |
1116 KB |
Output is correct |
7 |
Correct |
1 ms |
1116 KB |
Output is correct |
8 |
Correct |
1 ms |
1128 KB |
Output is correct |
9 |
Correct |
1 ms |
1112 KB |
Output is correct |
10 |
Correct |
1 ms |
1116 KB |
Output is correct |
11 |
Correct |
1 ms |
1116 KB |
Output is correct |
12 |
Correct |
1 ms |
1116 KB |
Output is correct |
13 |
Correct |
1 ms |
1116 KB |
Output is correct |
14 |
Correct |
1 ms |
1116 KB |
Output is correct |
15 |
Correct |
1 ms |
1116 KB |
Output is correct |
16 |
Correct |
1 ms |
1116 KB |
Output is correct |
17 |
Correct |
1 ms |
1112 KB |
Output is correct |
18 |
Correct |
1 ms |
1116 KB |
Output is correct |
19 |
Correct |
1 ms |
1116 KB |
Output is correct |
20 |
Correct |
12 ms |
1628 KB |
Output is correct |
21 |
Correct |
5 ms |
1372 KB |
Output is correct |
22 |
Correct |
16 ms |
1764 KB |
Output is correct |
23 |
Correct |
10 ms |
1372 KB |
Output is correct |
24 |
Correct |
7 ms |
1372 KB |
Output is correct |
25 |
Correct |
13 ms |
1628 KB |
Output is correct |
26 |
Correct |
7 ms |
1372 KB |
Output is correct |
27 |
Correct |
13 ms |
1496 KB |
Output is correct |
28 |
Correct |
16 ms |
1724 KB |
Output is correct |
29 |
Correct |
16 ms |
1624 KB |
Output is correct |
30 |
Correct |
15 ms |
1720 KB |
Output is correct |
31 |
Correct |
14 ms |
1732 KB |
Output is correct |
32 |
Correct |
16 ms |
1724 KB |
Output is correct |
33 |
Correct |
15 ms |
1884 KB |
Output is correct |
34 |
Correct |
15 ms |
1628 KB |
Output is correct |
35 |
Correct |
14 ms |
1732 KB |
Output is correct |
36 |
Correct |
15 ms |
1728 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
1116 KB |
Output is correct |
2 |
Correct |
10 ms |
1372 KB |
Output is correct |
3 |
Correct |
7 ms |
1464 KB |
Output is correct |
4 |
Correct |
13 ms |
1628 KB |
Output is correct |
5 |
Correct |
115 ms |
6808 KB |
Output is correct |
6 |
Correct |
138 ms |
5720 KB |
Output is correct |
7 |
Correct |
143 ms |
6212 KB |
Output is correct |
8 |
Correct |
1 ms |
1112 KB |
Output is correct |
9 |
Correct |
1 ms |
1116 KB |
Output is correct |
10 |
Correct |
1 ms |
1116 KB |
Output is correct |
11 |
Correct |
15 ms |
1728 KB |
Output is correct |
12 |
Correct |
144 ms |
5896 KB |
Output is correct |
13 |
Correct |
1 ms |
1112 KB |
Output is correct |
14 |
Correct |
14 ms |
1724 KB |
Output is correct |
15 |
Correct |
139 ms |
5724 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
72 ms |
3416 KB |
Output is correct |
2 |
Correct |
59 ms |
2908 KB |
Output is correct |
3 |
Correct |
138 ms |
5720 KB |
Output is correct |
4 |
Correct |
101 ms |
4440 KB |
Output is correct |
5 |
Correct |
1 ms |
1116 KB |
Output is correct |
6 |
Correct |
1 ms |
1116 KB |
Output is correct |
7 |
Correct |
14 ms |
1628 KB |
Output is correct |
8 |
Correct |
142 ms |
5720 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
1116 KB |
Output is correct |
2 |
Correct |
1 ms |
1116 KB |
Output is correct |
3 |
Correct |
1 ms |
1116 KB |
Output is correct |
4 |
Correct |
0 ms |
1116 KB |
Output is correct |
5 |
Correct |
1 ms |
1116 KB |
Output is correct |
6 |
Correct |
1 ms |
1116 KB |
Output is correct |
7 |
Correct |
1 ms |
1116 KB |
Output is correct |
8 |
Correct |
1 ms |
1128 KB |
Output is correct |
9 |
Correct |
1 ms |
1112 KB |
Output is correct |
10 |
Correct |
1 ms |
1116 KB |
Output is correct |
11 |
Correct |
1 ms |
1116 KB |
Output is correct |
12 |
Correct |
1 ms |
1116 KB |
Output is correct |
13 |
Correct |
1 ms |
1116 KB |
Output is correct |
14 |
Correct |
1 ms |
1116 KB |
Output is correct |
15 |
Correct |
1 ms |
1116 KB |
Output is correct |
16 |
Correct |
1 ms |
1116 KB |
Output is correct |
17 |
Correct |
1 ms |
1112 KB |
Output is correct |
18 |
Correct |
1 ms |
1116 KB |
Output is correct |
19 |
Correct |
1 ms |
1116 KB |
Output is correct |
20 |
Correct |
12 ms |
1628 KB |
Output is correct |
21 |
Correct |
5 ms |
1372 KB |
Output is correct |
22 |
Correct |
16 ms |
1764 KB |
Output is correct |
23 |
Correct |
10 ms |
1372 KB |
Output is correct |
24 |
Correct |
7 ms |
1372 KB |
Output is correct |
25 |
Correct |
13 ms |
1628 KB |
Output is correct |
26 |
Correct |
7 ms |
1372 KB |
Output is correct |
27 |
Correct |
13 ms |
1496 KB |
Output is correct |
28 |
Correct |
16 ms |
1724 KB |
Output is correct |
29 |
Correct |
16 ms |
1624 KB |
Output is correct |
30 |
Correct |
15 ms |
1720 KB |
Output is correct |
31 |
Correct |
14 ms |
1732 KB |
Output is correct |
32 |
Correct |
16 ms |
1724 KB |
Output is correct |
33 |
Correct |
15 ms |
1884 KB |
Output is correct |
34 |
Correct |
15 ms |
1628 KB |
Output is correct |
35 |
Correct |
14 ms |
1732 KB |
Output is correct |
36 |
Correct |
15 ms |
1728 KB |
Output is correct |
37 |
Correct |
1 ms |
1116 KB |
Output is correct |
38 |
Correct |
10 ms |
1372 KB |
Output is correct |
39 |
Correct |
7 ms |
1464 KB |
Output is correct |
40 |
Correct |
13 ms |
1628 KB |
Output is correct |
41 |
Correct |
115 ms |
6808 KB |
Output is correct |
42 |
Correct |
138 ms |
5720 KB |
Output is correct |
43 |
Correct |
143 ms |
6212 KB |
Output is correct |
44 |
Correct |
1 ms |
1112 KB |
Output is correct |
45 |
Correct |
1 ms |
1116 KB |
Output is correct |
46 |
Correct |
1 ms |
1116 KB |
Output is correct |
47 |
Correct |
15 ms |
1728 KB |
Output is correct |
48 |
Correct |
144 ms |
5896 KB |
Output is correct |
49 |
Correct |
1 ms |
1112 KB |
Output is correct |
50 |
Correct |
14 ms |
1724 KB |
Output is correct |
51 |
Correct |
139 ms |
5724 KB |
Output is correct |
52 |
Correct |
72 ms |
3416 KB |
Output is correct |
53 |
Correct |
59 ms |
2908 KB |
Output is correct |
54 |
Correct |
138 ms |
5720 KB |
Output is correct |
55 |
Correct |
101 ms |
4440 KB |
Output is correct |
56 |
Correct |
1 ms |
1116 KB |
Output is correct |
57 |
Correct |
1 ms |
1116 KB |
Output is correct |
58 |
Correct |
14 ms |
1628 KB |
Output is correct |
59 |
Correct |
142 ms |
5720 KB |
Output is correct |
60 |
Correct |
117 ms |
5176 KB |
Output is correct |
61 |
Correct |
140 ms |
5724 KB |
Output is correct |
62 |
Correct |
146 ms |
8448 KB |
Output is correct |
63 |
Correct |
136 ms |
5932 KB |
Output is correct |
64 |
Correct |
146 ms |
5720 KB |
Output is correct |
65 |
Correct |
148 ms |
5724 KB |
Output is correct |
66 |
Correct |
137 ms |
5720 KB |
Output is correct |
67 |
Correct |
146 ms |
5720 KB |
Output is correct |
68 |
Correct |
140 ms |
5724 KB |
Output is correct |
69 |
Correct |
145 ms |
7896 KB |
Output is correct |
70 |
Correct |
139 ms |
5724 KB |
Output is correct |
71 |
Correct |
140 ms |
5724 KB |
Output is correct |
72 |
Correct |
137 ms |
5724 KB |
Output is correct |