Submission #364010

#	Time	Username	Problem	Language	Result	Execution time	Memory
364010		super_j6	Sailing Race (CEOI12_race)	C++14	5 / 100	3091 ms	33340 KiB

race

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<int, int>
#define f first
#define s second
 
const int mxn = 1000;
int n, m;
pi dp[mxn][mxn][2][2], f[mxn][mxn][2][2];
vector<int> g[2][mxn];
 
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n >> m;
	
	for(int i = 0, x; i < n; i++)
	for(cin >> x; x; cin >> x)
	for(int j = 0; j < 2; j++)
	for(int l = 0; l < 2; l++){
		int u = j * n + i, v = l * n + x - 1;
		g[0][u].push_back(v);
		g[1][v].push_back(u);
	}
	
	pi ret;
	for(int i[2] = {0}; i[0] < 2 * n; i[0]++)
	for(i[1] = i[0]; i[1] < 2 * n && i[1] - i[0] < n; i[1]++)
	for(int j = 0; j < 2; j++)
	for(int k = 0; k < 2; k++){
		pi &dpc = dp[i[0]][i[1]][j][k];
		if(i[0] != i[1]){
			f[i[0]][i[1]][j][k] = max(dpc, f[i[0] + j][i[1] - !j][j][k]);
		}else{
			dpc.s = i[0];
		}
		
		for(int l : g[k][i[j]])
		for(int p = 0; p < 2; p++){
			if((l > i[p]) == p){
				int ii[2];
				ii[!p] = i[!p], ii[p] = l;
				if(ii[1] - ii[0] < n){
					dp[ii[0]][ii[1]][p][k] = max(dp[ii[0]][ii[1]][p][k], {dpc.f + 1, dpc.s});
					ii[!p] = i[p];
					pi ff[2];
					ff[k] = dpc, ff[!k] = f[ii[0] + p][ii[1] - !p][p][!k];
					ret = max(ret, {ff[0].f + ff[1].f + 1, ff[0].s});
				}
			}
		}
	}
	
	cout << ret.f << " " << (ret.s % n + 1) << endl;
	
	return 0;
}

• Subtask 1: 5 / 100