Submission #679072

#	Time	Username	Problem	Language	Result	Execution time	Memory
679072		vjudge1	Sailing Race (CEOI12_race)	C++17	40 / 100	225 ms	6668 KiB

race

#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1005;


int n, k, dp[MAXN][MAXN][2][2], ans, ans_node;
vector<int> adj[MAXN];
bool bio[MAXN];
int cur_i, cur_j, cur_b;
int main(){
	cin >> n >> k;
	for(int i = 0; i < n; ++i){
		int x; cin >> x;
		while(x){
			--x;
			adj[i].push_back(x);
			cin >> x;
		}
	}
	for(int off = 1; off < n; ++off){
		for(int i = 0; i < n; ++i){
			int j = (i + off) % n;
			for(int x : adj[i]){
				if((i < j && i < x && x <= j) || (i > j && (i < x || x <= j))){
					dp[i][j][0][0] = max(dp[i][j][0][0], max(dp[(i + 1) % n][x][1][1], dp[x][j][0][0]) + 1);
					dp[i][j][0][1] = max(dp[i][j][0][1], max(dp[(i + 1) % n][x][1][1], dp[x][j][0][1]) + 1);
				}
			}
			for(int x : adj[j]){
				if((i < j && i <= x && x < j) || (i > j && (i <= x || x < j))){
					dp[i][j][1][0] = max(dp[i][j][1][0], max(dp[i][x][1][0], dp[x][(j - 1 + n) % n][0][1]) + 1);
					dp[i][j][1][1] = max(dp[i][j][1][1], max(dp[i][x][1][1], dp[x][(j - 1 + n) % n][0][1]) + 1);
				}
			}
			ans = max(ans, dp[i][j][0][0]);
			ans = max(ans, dp[i][j][1][0]);
			if(dp[i][j][0][0] == ans){
				ans_node = i;
			}
			if(dp[i][j][1][0] == ans){
				ans_node = j;
			}
		}
	}
	cout << ans << "\n" << ans_node + 1;
	return 0;
}

• Subtask 1: 40 / 100