#include<bits/stdc++.h>
using namespace std;
const int N = 1e5+10;
const int B = 600;
int n;
int d[N], x[N], dp[N];
int pref[B][B];
const int mod = 1e9+7;
void calc(int pos){
if(d[pos] == 0) return;
int comp = x[pos];
comp = min(comp, (n-pos)/d[pos]);
//cout << pos << ' ' << comp << ' ';
if(pos+comp*d[pos] <= n){
for(int i = 1;i <= comp;i++){
dp[pos] += dp[pos+d[pos]*i];
dp[pos] %= mod;
}
return;
}
else{
dp[pos] += pref[d[pos]][pos % d[pos]];
dp[pos] %= mod;
return;
}
}
void upd(int pos){
for(int i = 1;i < B;i++){
pref[i][pos % i] += dp[pos];
pref[i][pos % i] %= mod;
}
return;
}
int main(){
ios::sync_with_stdio(false); cin.tie(0);
cin >> n;
for(int i = 1;i <= n;i++){
cin >> d[i] >> x[i];
}
for(int i = 1;i <= n;i++){
dp[i] = 1;
}
for(int i = n;i >= 1;i--){
calc(i);
upd(i);
}
cout << dp[1] << '\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2904 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
0 ms |
2652 KB |
Output is correct |
4 |
Correct |
1 ms |
2652 KB |
Output is correct |
5 |
Correct |
1 ms |
2652 KB |
Output is correct |
6 |
Correct |
1 ms |
2652 KB |
Output is correct |
7 |
Correct |
1 ms |
2652 KB |
Output is correct |
8 |
Correct |
1 ms |
2508 KB |
Output is correct |
9 |
Correct |
0 ms |
2652 KB |
Output is correct |
10 |
Correct |
0 ms |
2652 KB |
Output is correct |
11 |
Correct |
1 ms |
2652 KB |
Output is correct |
12 |
Correct |
0 ms |
2652 KB |
Output is correct |
13 |
Correct |
0 ms |
2652 KB |
Output is correct |
14 |
Correct |
1 ms |
2652 KB |
Output is correct |
15 |
Correct |
1 ms |
2648 KB |
Output is correct |
16 |
Correct |
1 ms |
2648 KB |
Output is correct |
17 |
Correct |
0 ms |
2652 KB |
Output is correct |
18 |
Correct |
1 ms |
2904 KB |
Output is correct |
19 |
Correct |
0 ms |
2652 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2904 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
0 ms |
2652 KB |
Output is correct |
4 |
Correct |
1 ms |
2652 KB |
Output is correct |
5 |
Correct |
1 ms |
2652 KB |
Output is correct |
6 |
Correct |
1 ms |
2652 KB |
Output is correct |
7 |
Correct |
1 ms |
2652 KB |
Output is correct |
8 |
Correct |
1 ms |
2508 KB |
Output is correct |
9 |
Correct |
0 ms |
2652 KB |
Output is correct |
10 |
Correct |
0 ms |
2652 KB |
Output is correct |
11 |
Correct |
1 ms |
2652 KB |
Output is correct |
12 |
Correct |
0 ms |
2652 KB |
Output is correct |
13 |
Correct |
0 ms |
2652 KB |
Output is correct |
14 |
Correct |
1 ms |
2652 KB |
Output is correct |
15 |
Correct |
1 ms |
2648 KB |
Output is correct |
16 |
Correct |
1 ms |
2648 KB |
Output is correct |
17 |
Correct |
0 ms |
2652 KB |
Output is correct |
18 |
Correct |
1 ms |
2904 KB |
Output is correct |
19 |
Correct |
0 ms |
2652 KB |
Output is correct |
20 |
Correct |
22 ms |
2696 KB |
Output is correct |
21 |
Correct |
5 ms |
2652 KB |
Output is correct |
22 |
Correct |
16 ms |
2704 KB |
Output is correct |
23 |
Correct |
74 ms |
2652 KB |
Output is correct |
24 |
Correct |
6 ms |
2652 KB |
Output is correct |
25 |
Correct |
18 ms |
2652 KB |
Output is correct |
26 |
Correct |
43 ms |
2680 KB |
Output is correct |
27 |
Correct |
144 ms |
2652 KB |
Output is correct |
28 |
Correct |
34 ms |
2652 KB |
Output is correct |
29 |
Correct |
194 ms |
2648 KB |
Output is correct |
30 |
Correct |
15 ms |
2648 KB |
Output is correct |
31 |
Correct |
103 ms |
2652 KB |
Output is correct |
32 |
Correct |
193 ms |
2648 KB |
Output is correct |
33 |
Correct |
15 ms |
2652 KB |
Output is correct |
34 |
Correct |
15 ms |
2652 KB |
Output is correct |
35 |
Correct |
14 ms |
2652 KB |
Output is correct |
36 |
Correct |
23 ms |
2700 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2648 KB |
Output is correct |
2 |
Correct |
75 ms |
2672 KB |
Output is correct |
3 |
Correct |
43 ms |
2652 KB |
Output is correct |
4 |
Correct |
143 ms |
2652 KB |
Output is correct |
5 |
Correct |
104 ms |
2904 KB |
Output is correct |
6 |
Execution timed out |
2044 ms |
2904 KB |
Time limit exceeded |
7 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1271 ms |
2648 KB |
Output is correct |
2 |
Correct |
888 ms |
2648 KB |
Output is correct |
3 |
Execution timed out |
2059 ms |
2908 KB |
Time limit exceeded |
4 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2904 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
0 ms |
2652 KB |
Output is correct |
4 |
Correct |
1 ms |
2652 KB |
Output is correct |
5 |
Correct |
1 ms |
2652 KB |
Output is correct |
6 |
Correct |
1 ms |
2652 KB |
Output is correct |
7 |
Correct |
1 ms |
2652 KB |
Output is correct |
8 |
Correct |
1 ms |
2508 KB |
Output is correct |
9 |
Correct |
0 ms |
2652 KB |
Output is correct |
10 |
Correct |
0 ms |
2652 KB |
Output is correct |
11 |
Correct |
1 ms |
2652 KB |
Output is correct |
12 |
Correct |
0 ms |
2652 KB |
Output is correct |
13 |
Correct |
0 ms |
2652 KB |
Output is correct |
14 |
Correct |
1 ms |
2652 KB |
Output is correct |
15 |
Correct |
1 ms |
2648 KB |
Output is correct |
16 |
Correct |
1 ms |
2648 KB |
Output is correct |
17 |
Correct |
0 ms |
2652 KB |
Output is correct |
18 |
Correct |
1 ms |
2904 KB |
Output is correct |
19 |
Correct |
0 ms |
2652 KB |
Output is correct |
20 |
Correct |
22 ms |
2696 KB |
Output is correct |
21 |
Correct |
5 ms |
2652 KB |
Output is correct |
22 |
Correct |
16 ms |
2704 KB |
Output is correct |
23 |
Correct |
74 ms |
2652 KB |
Output is correct |
24 |
Correct |
6 ms |
2652 KB |
Output is correct |
25 |
Correct |
18 ms |
2652 KB |
Output is correct |
26 |
Correct |
43 ms |
2680 KB |
Output is correct |
27 |
Correct |
144 ms |
2652 KB |
Output is correct |
28 |
Correct |
34 ms |
2652 KB |
Output is correct |
29 |
Correct |
194 ms |
2648 KB |
Output is correct |
30 |
Correct |
15 ms |
2648 KB |
Output is correct |
31 |
Correct |
103 ms |
2652 KB |
Output is correct |
32 |
Correct |
193 ms |
2648 KB |
Output is correct |
33 |
Correct |
15 ms |
2652 KB |
Output is correct |
34 |
Correct |
15 ms |
2652 KB |
Output is correct |
35 |
Correct |
14 ms |
2652 KB |
Output is correct |
36 |
Correct |
23 ms |
2700 KB |
Output is correct |
37 |
Correct |
1 ms |
2648 KB |
Output is correct |
38 |
Correct |
75 ms |
2672 KB |
Output is correct |
39 |
Correct |
43 ms |
2652 KB |
Output is correct |
40 |
Correct |
143 ms |
2652 KB |
Output is correct |
41 |
Correct |
104 ms |
2904 KB |
Output is correct |
42 |
Execution timed out |
2044 ms |
2904 KB |
Time limit exceeded |
43 |
Halted |
0 ms |
0 KB |
- |