oj.uz

Submission #81955

# Submission time Handle Problem Language Result Execution time Memory
81955 2018-10-28T08:53:50 Z Saboon Calvinball championship (CEOI15_teams) C++14
20 / 100
 79 ms 66560 KB 
#include <bits/stdc++.h>
#define F first
#define S second
#define PB push_back
#define PF push_front
#define MP make_pair
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
const int maxn = 1e4 + 10;
const int mod = 1e9 + 7;

ll dp[maxn][maxn], par[maxn], a[maxn];

int main() {
	int n;
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
		par[i] = max (par[i - 1], a[i]);
	}

	for (int i = 1; i <= n; i++)
		dp[0][i] = 1;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= n; j++) {
			dp[i][j] = (1ll * j * dp[i - 1][j] + dp[i - 1][j + 1]) % mod;
		}
	}
	ll ans = 0;
	for (int i = 1; i <= n; i++) {
		ans = (ans + 1ll * (a[i] - 1) * dp[n - i][par[i - 1]] % mod);
	}
	cout << (ans + 1) % mod << endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 512 KB Output is correct
3 Correct 2 ms 628 KB Output is correct
4 Correct 2 ms 628 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 2 ms 640 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 640 KB Output is correct
2 Correct 3 ms 640 KB Output is correct
3 Correct 3 ms 640 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 640 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 1032 KB Output isn't correct

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 1036 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 4624 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 15 ms 12576 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 79 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 70 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 79 ms 66560 KB Execution killed with signal 9 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -