Submission #531356

#	Time	Username	Problem	Language	Result	Execution time	Memory
531356		sidon	Calvinball championship (CEOI15_teams)	C++17	100 / 100	218 ms	632 KiB

teams

#include <bits/stdc++.h>
using namespace std;
#define int long long

const int M = 1e6+7;

int32_t main() {
	int N;
	cin >> N;

	int a[N];
	for(int &i : a) cin >> i, --i;

	int b[N] {a[0]}, res = 1;

	for(int i = 1; i < N; ++i)
		b[i] = max(b[i-1], a[i]);

	vector<int> cur(N+1, 1), dp(N+1);

	for(int i = N; i--; ) {
		swap(cur, dp);

		for(int j = 0; j <= N; ++j)
			cur[j] = ((j + 1 < N ? dp[j + 1] : 0LL) + j * dp[j]) % M;
		res += a[i] * dp[i ? b[i-1] + 1 : 0];
	}

	cout << (res % M);
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10