| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 1052935 |
2024-08-11T06:18:05 Z |
vjudge1 |
Trains (BOI24_trains) |
C++17 |
|
130 ms |
3512 KB |
#include <bits/stdc++.h>
using namespace std;
#define int long long
int const N=1e5+5;
int const mod=1e9+7;
int dp[N],suf[N],d[N],x[N];
int n;
void solve(){
dp[n]=1;
suf[n]=1;
for(int i=n-1;i>=1;i--){
dp[i]=1;
if(d[i]==0){
suf[i]=1;
continue;
}
for(int j=i+d[i];j<=n;j+=d[i]){
if(d[j]==d[i]){
dp[i]=(dp[i]+suf[j])%mod;
break;
}
dp[i]=(dp[i]+dp[j])%mod;
}
suf[i]=(dp[i] + (mod-1))%mod;
for(int j=i+(d[i]*(x[i]+1)); j<=n;j+=d[i]){
if(d[i]==d[j]){
dp[i]=((dp[i]-suf[j])+mod)%mod;
break;
}
dp[i]=((dp[i]-dp[j])+mod)%mod;
}
suf[i]=(dp[i]+suf[i])%mod;
}
// for (int i = 1; i <=n; ++i)
// cout<<dp[i]<<' '<<suf[i]<<endl;
// for(int i=1;i<=n;i++)
// cout<<dp[i]<<endl;
cout<<dp[1]<<endl;
}
signed main(){
cin>>n;
bool b=1;
for (int i = 1; i <=n; ++i){
cin>>d[i]>>x[i];
if(d[i]!=1)
b=0;
}
solve();
return 0;
}
Compilation message
Main.cpp: In function 'int main()':
Main.cpp:46:7: warning: variable 'b' set but not used [-Wunused-but-set-variable]
46 | bool b=1;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 2 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 6 |
Correct |
0 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 |
0 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 |
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 |
1 ms |
2396 KB |
Output is correct |
| 18 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2396 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 2 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 6 |
Correct |
0 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 |
0 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 |
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 |
1 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 |
3 ms |
2396 KB |
Output is correct |
| 21 |
Correct |
1 ms |
2504 KB |
Output is correct |
| 22 |
Correct |
7 ms |
2652 KB |
Output is correct |
| 23 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 24 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 25 |
Correct |
4 ms |
2396 KB |
Output is correct |
| 26 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 27 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 28 |
Correct |
3 ms |
2652 KB |
Output is correct |
| 29 |
Correct |
3 ms |
2648 KB |
Output is correct |
| 30 |
Correct |
4 ms |
2552 KB |
Output is correct |
| 31 |
Correct |
6 ms |
2652 KB |
Output is correct |
| 32 |
Correct |
3 ms |
2652 KB |
Output is correct |
| 33 |
Correct |
5 ms |
2652 KB |
Output is correct |
| 34 |
Correct |
3 ms |
2540 KB |
Output is correct |
| 35 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 36 |
Correct |
4 ms |
2408 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 2 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
11 ms |
3192 KB |
Output is correct |
| 6 |
Correct |
22 ms |
3444 KB |
Output is correct |
| 7 |
Correct |
26 ms |
3412 KB |
Output is correct |
| 8 |
Correct |
0 ms |
2392 KB |
Output is correct |
| 9 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 11 |
Correct |
3 ms |
2652 KB |
Output is correct |
| 12 |
Correct |
28 ms |
3420 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
3 ms |
2532 KB |
Output is correct |
| 15 |
Correct |
27 ms |
3420 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
28 ms |
2904 KB |
Output is correct |
| 2 |
Correct |
12 ms |
2928 KB |
Output is correct |
| 3 |
Correct |
28 ms |
3416 KB |
Output is correct |
| 4 |
Correct |
21 ms |
3156 KB |
Output is correct |
| 5 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2400 KB |
Output is correct |
| 7 |
Correct |
6 ms |
2656 KB |
Output is correct |
| 8 |
Correct |
36 ms |
3436 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 2 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 6 |
Correct |
0 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 |
0 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 |
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 |
1 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 |
3 ms |
2396 KB |
Output is correct |
| 21 |
Correct |
1 ms |
2504 KB |
Output is correct |
| 22 |
Correct |
7 ms |
2652 KB |
Output is correct |
| 23 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 24 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 25 |
Correct |
4 ms |
2396 KB |
Output is correct |
| 26 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 27 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 28 |
Correct |
3 ms |
2652 KB |
Output is correct |
| 29 |
Correct |
3 ms |
2648 KB |
Output is correct |
| 30 |
Correct |
4 ms |
2552 KB |
Output is correct |
| 31 |
Correct |
6 ms |
2652 KB |
Output is correct |
| 32 |
Correct |
3 ms |
2652 KB |
Output is correct |
| 33 |
Correct |
5 ms |
2652 KB |
Output is correct |
| 34 |
Correct |
3 ms |
2540 KB |
Output is correct |
| 35 |
Correct |
2 ms |
2652 KB |
Output is correct |
| 36 |
Correct |
4 ms |
2408 KB |
Output is correct |
| 37 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 38 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 39 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 40 |
Correct |
2 ms |
2396 KB |
Output is correct |
| 41 |
Correct |
11 ms |
3192 KB |
Output is correct |
| 42 |
Correct |
22 ms |
3444 KB |
Output is correct |
| 43 |
Correct |
26 ms |
3412 KB |
Output is correct |
| 44 |
Correct |
0 ms |
2392 KB |
Output is correct |
| 45 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 46 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 47 |
Correct |
3 ms |
2652 KB |
Output is correct |
| 48 |
Correct |
28 ms |
3420 KB |
Output is correct |
| 49 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 50 |
Correct |
3 ms |
2532 KB |
Output is correct |
| 51 |
Correct |
27 ms |
3420 KB |
Output is correct |
| 52 |
Correct |
28 ms |
2904 KB |
Output is correct |
| 53 |
Correct |
12 ms |
2928 KB |
Output is correct |
| 54 |
Correct |
28 ms |
3416 KB |
Output is correct |
| 55 |
Correct |
21 ms |
3156 KB |
Output is correct |
| 56 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 57 |
Correct |
0 ms |
2400 KB |
Output is correct |
| 58 |
Correct |
6 ms |
2656 KB |
Output is correct |
| 59 |
Correct |
36 ms |
3436 KB |
Output is correct |
| 60 |
Correct |
33 ms |
3160 KB |
Output is correct |
| 61 |
Correct |
26 ms |
3420 KB |
Output is correct |
| 62 |
Correct |
30 ms |
3432 KB |
Output is correct |
| 63 |
Correct |
27 ms |
3336 KB |
Output is correct |
| 64 |
Correct |
39 ms |
3408 KB |
Output is correct |
| 65 |
Correct |
84 ms |
3408 KB |
Output is correct |
| 66 |
Correct |
27 ms |
3408 KB |
Output is correct |
| 67 |
Correct |
36 ms |
3416 KB |
Output is correct |
| 68 |
Correct |
28 ms |
3412 KB |
Output is correct |
| 69 |
Correct |
130 ms |
3512 KB |
Output is correct |
| 70 |
Correct |
37 ms |
3440 KB |
Output is correct |
| 71 |
Correct |
25 ms |
3408 KB |
Output is correct |
| 72 |
Correct |
86 ms |
3412 KB |
Output is correct |
