#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 10007;
const ll inf = 2e9;
const ll mod = 1e6 + 7;
const double pi = acos(-1);
const int dx[] = {0, -1, 0, 1}, dy[] = {1, 0, -1, 0};
const int block = 320;
ll n, a[M], dp[M][M], pref[M], ans = 1;
ll solve(int i, int team){
if(i < 1) return 0;
if(i == n) return 1;
ll &ret = dp[i][team];
if(ret != -1) return ret;
ret = 0;
for(int j = 1; j <= team + 1; ++j) ret = (ret + solve(i + 1, max(team, j))) % mod;
return ret;
}
int main(){
cin >> n;
for(int i = 1; i <= n; ++i) cin >> a[i], pref[i] = max(pref[i - 1], a[i]);
for(int i = 0; i <= n; ++i) for(int j = 0; j <= n; ++j) dp[i][j] = -1;
for(int i = 1; i <= n; ++i) for(ll j = 1; j < a[i]; ++j) ans = (ans + solve(i, max(pref[i - 1], j))) % mod;
cout << ans << endl;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
0 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
1 ms |
204 KB |
Output is correct |
6 |
Correct |
0 ms |
204 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
436 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
0 ms |
332 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
0 ms |
332 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
716 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
804 KB |
Output is correct |
2 |
Correct |
2 ms |
812 KB |
Output is correct |
3 |
Correct |
2 ms |
716 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
150 ms |
4368 KB |
Output is correct |
2 |
Correct |
142 ms |
4384 KB |
Output is correct |
3 |
Correct |
141 ms |
4420 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Execution timed out |
1088 ms |
12364 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
32 ms |
65540 KB |
Execution killed with signal 9 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
30 ms |
65540 KB |
Execution killed with signal 9 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Runtime error |
37 ms |
65540 KB |
Execution killed with signal 9 |
2 |
Halted |
0 ms |
0 KB |
- |