oj.uz

답안 #403654

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
403654 2021-05-13T10:49:56 Z saleh Calvinball championship (CEOI15_teams) C++17
100 / 100
 442 ms 1092 KB 
#include <bits/stdc++.h>


using namespace std;


const int MAXN = 10 * 1000 + 23, D = 1000 * 1000 + 7;















int dp[2][MAXN], a[MAXN], n, cnt[MAXN], jav;



int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr), cout.tie(nullptr);
	cin >> n;
	for (int i = 0; i < n; i++) cin >> a[i];
	{
		set<int> s;
		for (int i = 0; i < n; i++) {
			s.insert(a[i]);
			cnt[i] = s.size();
		}
	}
	fill(dp[1], dp[1] + n, 1);
	for (int i = 0; i < n - 1; i++) {
		for (int j = 1; j < n - 1; j++) dp[i & 1][j] = (1ll * dp[1 - (i & 1)][j] * j % D + dp[1 - (i & 1)][j + 1]) % D;
		int j = n - i - 1;
		jav += 1ll * (a[j] - 1) * dp[1 - (i & 1)][cnt[j - 1]] % D;
		jav %= D;
	}
	cout << (jav + 1) % D;
	return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 228 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct

Subtask #3
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct

Subtask #6
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 2 ms 204 KB Output is correct
3 Correct 3 ms 332 KB Output is correct

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 332 KB Output is correct
2 Correct 5 ms 332 KB Output is correct
3 Correct 5 ms 332 KB Output is correct

Subtask #8
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 407 ms 912 KB Output is correct

Subtask #9
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 113 ms 332 KB Output is correct
2 Correct 104 ms 404 KB Output is correct
3 Correct 104 ms 648 KB Output is correct

Subtask #10
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 442 ms 460 KB Output is correct
2 Correct 426 ms 484 KB Output is correct
3 Correct 435 ms 1092 KB Output is correct