#include <bits/stdc++.h>
#define int long long
using namespace std;
const int mod = 1e6 + 7;
const int LOG = 20;
const int maxn = 1e5 + 5;
int dp[1005][1005][2];
signed main() {
int n;
cin >> n;
vector<int> v(n+1);
for(int i=1; i<=n; i++) cin >> v[i];
dp[1][1][0] = 1;
for(int i=1; i<n; i++) {
for(int j=1; j<=i; j++) {
for(int k=0; k<2; k++) {
for(int x=1; x<=j+1; x++) {
if(!k && x > v[i+1]) continue;
dp[i+1][max(j, k)][k|(x<v[i+1])] = (dp[i+1][max(j, k)][k|(x<v[i+1])] + dp[i][j][k]) % mod;
}
}
}
}
long long ans = 0;
for(int i=1; i<=n; i++) ans = (ans + dp[n][i][1]) % mod;
cout << (ans + 1) % mod << '\n';
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
2 ms |
860 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
1 ms |
860 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
90 ms |
4176 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
692 ms |
11600 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1033 ms |
11364 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
723 ms |
23632 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
717 ms |
23636 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |