| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 994668 |
2024-06-08T03:26:57 Z |
hmm789 |
Trains (BOI24_trains) |
C++14 |
|
297 ms |
130388 KB |
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define MOD 1000000007
const int B = 320;
int sm[B][B][B];
int32_t main() {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
int n;
cin >> n;
int d[n], x[n], dp[n];
for(int i = 0; i < n; i++) cin >> d[i] >> x[i];
for(int i = n-1; i >= 0; i--) {
dp[i] = 1;
if(d[i] == 0) {
} else if(d[i] < B) {
int mn = min(i+d[i]*x[i], n-1);
while(mn % d[i] != i%d[i]) mn--;
int lblk = i/B, rblk = mn/B;
if(rblk-lblk < 2) {
for(int j = 1; j <= x[i]; j++) {
if(i+j*d[i] >= n) break;
dp[i] += dp[i+j*d[i]];
dp[i] %= MOD;
}
} else {
for(int j = lblk+1; j < rblk; j++) {
dp[i] += sm[d[i]][i%d[i]][j];
dp[i] %= MOD;
}
int st = (lblk+1)*B-1, ed = rblk*B;
st = st-st%d[i]+i%d[i];
if(st >= (lblk+1)*B) st -= d[i];
for(; st >= i; st -= d[i]) {
dp[i] += dp[st];
dp[i] %= MOD;
}
ed = ed-ed%d[i]+i%d[i];
if(ed < rblk*B) ed += d[i];
for(; ed <= mn; ed += d[i]) {
dp[i] += dp[ed];
dp[i] %= MOD;
}
}
} else {
for(int j = 1; j <= x[i]; j++) {
if(i+j*d[i] >= n) break;
dp[i] += dp[i+j*d[i]];
dp[i] %= MOD;
}
}
for(int j = 1; j < B; j++) {
sm[j][i%j][i/B] += dp[i];
sm[j][i%j][i/B] %= MOD;
}
}
cout << dp[0];
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
4696 KB |
Output is correct |
| 2 |
Correct |
4 ms |
7260 KB |
Output is correct |
| 3 |
Correct |
6 ms |
10844 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5980 KB |
Output is correct |
| 5 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 6 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2016 KB |
Output is correct |
| 11 |
Correct |
6 ms |
13324 KB |
Output is correct |
| 12 |
Correct |
8 ms |
13404 KB |
Output is correct |
| 13 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 14 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 15 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 16 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 17 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 18 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 19 |
Correct |
6 ms |
13400 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
4696 KB |
Output is correct |
| 2 |
Correct |
4 ms |
7260 KB |
Output is correct |
| 3 |
Correct |
6 ms |
10844 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5980 KB |
Output is correct |
| 5 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 6 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2016 KB |
Output is correct |
| 11 |
Correct |
6 ms |
13324 KB |
Output is correct |
| 12 |
Correct |
8 ms |
13404 KB |
Output is correct |
| 13 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 14 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 15 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 16 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 17 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 18 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 19 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 20 |
Incorrect |
85 ms |
129084 KB |
Output isn't correct |
| 21 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
8 ms |
13404 KB |
Output is correct |
| 2 |
Incorrect |
88 ms |
129024 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
297 ms |
130388 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
4696 KB |
Output is correct |
| 2 |
Correct |
4 ms |
7260 KB |
Output is correct |
| 3 |
Correct |
6 ms |
10844 KB |
Output is correct |
| 4 |
Correct |
3 ms |
5980 KB |
Output is correct |
| 5 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 6 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 7 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 8 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 9 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 10 |
Correct |
2 ms |
2016 KB |
Output is correct |
| 11 |
Correct |
6 ms |
13324 KB |
Output is correct |
| 12 |
Correct |
8 ms |
13404 KB |
Output is correct |
| 13 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 14 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 15 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 16 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 17 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 18 |
Correct |
6 ms |
13404 KB |
Output is correct |
| 19 |
Correct |
6 ms |
13400 KB |
Output is correct |
| 20 |
Incorrect |
85 ms |
129084 KB |
Output isn't correct |
| 21 |
Halted |
0 ms |
0 KB |
- |
