Submission #1168176

#	Time	Username	Problem	Language	Result	Execution time	Memory
1168176		stdfloat	Boat (APIO16_boat)	C++20	9 / 100	1 ms	328 KiB

boat

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

using ll = long long;

const int md = (int)1e9 + 7;

int main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);

	int n;
	cin >> n;

	vector<int> a(n);
	for (int i = 0; i < n; i++)
		cin >> a[i] >> a[i];

	vector<vector<int>> dp(n, vector<int>(2));
	dp[0][0] = dp[0][1] = 1;
	for (int i = 1; i < n; i++) {
		dp[i][0] = (dp[i - 1][0] + dp[i - 1][1]) % md;

		dp[i][1] = 1;
		for (int j = 0; j < i; j++)
			if (a[j] < a[i]) dp[i][1] = (dp[i][1] + dp[j][1]) % md;
	}

	cout << (dp[n - 1][0] + dp[n - 1][1] - 1) % md;
}

• Subtask 1: 9 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 27
• Subtask 4: 0 / 42