Submission #1027470

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027470		Muhammet	Boat (APIO16_boat)	C++17	0 / 100	1 ms	348 KiB

boat

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

#define ll long long int
#define sz(x) (int)x.size()
#define ff first
#define ss second

const ll N = 505;
const ll M = 1e9 + 7;

int T, n, a[N], b[N], dp[N][5];

int main(){
	ios::sync_with_stdio(false); cin.tie(0);

	cin >> n;
	for(int i = 1; i <= n; i++){
		cin >> a[i] >> b[i];
	}
	int ans = 0;
	for(int i = 1; i <= n; i++){
		int mx = 0, mx1 = 0, mx2 = 0;
		for(int j = 1; j < i; j++){
			mx = max(mx,dp[j][0]);
			mx1 = max(mx1,dp[j][1]);
			if(a[j] < a[i]) mx2 = max(mx2,dp[j][1]);
		}
		dp[i][0] = max(mx1,mx);
		dp[i][1] = mx2+1;
		ans += dp[i][0];
		ans += dp[i][1];
		ans %= M;
		dp[i][0] %= M;
		dp[i][1] %= M;
	}

	cout << ans;

	return 0;
}

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