#include <bits/stdc++.h>
using namespace std;
const int N=1e5+5;
const int K=320;
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+1LL*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 |
1 ms |
2648 KB |
Output is correct |
2 |
Correct |
0 ms |
2552 KB |
Output is correct |
3 |
Correct |
0 ms |
2520 KB |
Output is correct |
4 |
Correct |
0 ms |
2396 KB |
Output is correct |
5 |
Correct |
0 ms |
2392 KB |
Output is correct |
6 |
Correct |
0 ms |
2396 KB |
Output is correct |
7 |
Correct |
0 ms |
2396 KB |
Output is correct |
8 |
Correct |
1 ms |
2396 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
1 ms |
2512 KB |
Output is correct |
11 |
Correct |
1 ms |
2396 KB |
Output is correct |
12 |
Correct |
0 ms |
2396 KB |
Output is correct |
13 |
Correct |
0 ms |
2524 KB |
Output is correct |
14 |
Correct |
0 ms |
2396 KB |
Output is correct |
15 |
Correct |
0 ms |
2396 KB |
Output is correct |
16 |
Correct |
0 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 |
0 ms |
2396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2648 KB |
Output is correct |
2 |
Correct |
0 ms |
2552 KB |
Output is correct |
3 |
Correct |
0 ms |
2520 KB |
Output is correct |
4 |
Correct |
0 ms |
2396 KB |
Output is correct |
5 |
Correct |
0 ms |
2392 KB |
Output is correct |
6 |
Correct |
0 ms |
2396 KB |
Output is correct |
7 |
Correct |
0 ms |
2396 KB |
Output is correct |
8 |
Correct |
1 ms |
2396 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
1 ms |
2512 KB |
Output is correct |
11 |
Correct |
1 ms |
2396 KB |
Output is correct |
12 |
Correct |
0 ms |
2396 KB |
Output is correct |
13 |
Correct |
0 ms |
2524 KB |
Output is correct |
14 |
Correct |
0 ms |
2396 KB |
Output is correct |
15 |
Correct |
0 ms |
2396 KB |
Output is correct |
16 |
Correct |
0 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 |
0 ms |
2396 KB |
Output is correct |
20 |
Correct |
10 ms |
12888 KB |
Output is correct |
21 |
Runtime error |
6 ms |
7512 KB |
Execution killed with signal 11 |
22 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2520 KB |
Output is correct |
2 |
Correct |
7 ms |
10588 KB |
Output is correct |
3 |
Correct |
5 ms |
8028 KB |
Output is correct |
4 |
Correct |
10 ms |
13148 KB |
Output is correct |
5 |
Correct |
98 ms |
100424 KB |
Output is correct |
6 |
Correct |
113 ms |
127568 KB |
Output is correct |
7 |
Correct |
131 ms |
127824 KB |
Output is correct |
8 |
Correct |
0 ms |
2392 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
0 ms |
2396 KB |
Output is correct |
11 |
Correct |
13 ms |
15020 KB |
Output is correct |
12 |
Correct |
114 ms |
128084 KB |
Output is correct |
13 |
Correct |
1 ms |
2392 KB |
Output is correct |
14 |
Correct |
13 ms |
15044 KB |
Output is correct |
15 |
Correct |
107 ms |
127980 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
64 ms |
63764 KB |
Output is correct |
2 |
Correct |
51 ms |
53420 KB |
Output is correct |
3 |
Correct |
127 ms |
127984 KB |
Output is correct |
4 |
Correct |
82 ms |
93760 KB |
Output is correct |
5 |
Correct |
1 ms |
2392 KB |
Output is correct |
6 |
Correct |
0 ms |
2396 KB |
Output is correct |
7 |
Correct |
13 ms |
15196 KB |
Output is correct |
8 |
Correct |
118 ms |
128084 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2648 KB |
Output is correct |
2 |
Correct |
0 ms |
2552 KB |
Output is correct |
3 |
Correct |
0 ms |
2520 KB |
Output is correct |
4 |
Correct |
0 ms |
2396 KB |
Output is correct |
5 |
Correct |
0 ms |
2392 KB |
Output is correct |
6 |
Correct |
0 ms |
2396 KB |
Output is correct |
7 |
Correct |
0 ms |
2396 KB |
Output is correct |
8 |
Correct |
1 ms |
2396 KB |
Output is correct |
9 |
Correct |
1 ms |
2396 KB |
Output is correct |
10 |
Correct |
1 ms |
2512 KB |
Output is correct |
11 |
Correct |
1 ms |
2396 KB |
Output is correct |
12 |
Correct |
0 ms |
2396 KB |
Output is correct |
13 |
Correct |
0 ms |
2524 KB |
Output is correct |
14 |
Correct |
0 ms |
2396 KB |
Output is correct |
15 |
Correct |
0 ms |
2396 KB |
Output is correct |
16 |
Correct |
0 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 |
0 ms |
2396 KB |
Output is correct |
20 |
Correct |
10 ms |
12888 KB |
Output is correct |
21 |
Runtime error |
6 ms |
7512 KB |
Execution killed with signal 11 |
22 |
Halted |
0 ms |
0 KB |
- |