Submission #1100275

#	Time	Username	Problem	Language	Result	Execution time	Memory
1100275		vjudge1	Coin Collecting (JOI19_ho_t4)	C++17	0 / 100	1 ms	508 KiB

joi2019_ho_t4

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define ll long long
#define F first
#define S second
#define ull unsigned long long
#define db double
#define ldb long double
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ppf pop_front
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define ordered_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
#define all(x) x.begin(), x.end()

const int mod = 1e9 + 7;
const int N = 500001;

using namespace std;
using namespace __gnu_pbds;

ll n, a, b, p[N][3], ans, f[N][3];
vector <ll> v[3], q[3];

ll gcd (ll a, ll b){while (a > 0 && b > 0){if (a >= b){a %= b;}else{b %= a;}}return a + b;}
ll binpow (ll a, ll b){
	a %= mod;if (b == 0){return 1;}
	else if (b % 2 == 1){
		return binpow (a, b - 1) % mod * a % mod;
	}
	else{
		ll t = binpow (a, b / 2) % mod;
		return t * t % mod;
	}
}

signed main (){
	ios_base::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	cin >> n;
	for (int i = 1; i <= n + n; i++){
		cin >> a >> b;
		if (a < 1){
			if (b >= 2){
				p[1][2]++;
				ans += abs (a - 1) + abs (b - 2);
			}
			else{
				p[1][1]++;
				ans += abs (a - 1) + abs (b - 1);
			}
		}
		else if (a > n){
			if (b >= 2){
				p[n][2]++;
				ans += abs (a - n) + abs (b - 2);	
			}
			else{
				p[n][1]++;
				ans += abs (a - n) + abs (b - 1);
			}
		}
		else{
			if (b >= 2){
				p[a][2]++;
				ans += abs (b - 2);
			}
			else{
				p[a][1]++;
				ans += abs (b - 1);
			}
		}
	}
//	for (int i = 1; i <= n; i++){
//		for (int y = 1; y <= 2; y++){
//			cout << p[i][y] << ' ';
//		}
//		cout << '\n';
//	}
	for (int i = 1; i <= n; i++){
		for (int y = 1; y <= 2; y++){
			if (p[i][y] == 0){
				a = y;
				if (y == 1){
					b = 2;
				}
				else{
					b = 1;
				}
				if (v[a].size()){
					ans += abs (v[a][v[a].size() - 1] - i);
					p[v[a][v[a].size() - 1]][a]--;
					if (p[v[a][v[a].size() - 1]][a] == 1){
						v[a].ppb();
					}
				}
				else if (v[b].size()){
					ans += abs (v[b][v[b].size() - 1] - i);
					ans++;
					p[v[b][v[b].size() - 1]][b]--;
					if (p[v[b][v[b].size() - 1]][b] == 1){
						v[b].ppb();
					}
				}
				else{
					q[y].pb(i);
				}
			}
			else if (p[i][y] > 1){
				if (y == 1){
					b = 2;
				}
				else{
					b = 1;
				}
				while (p[i][y] > 1 && q[y].size()){
					ans += abs (i - q[y][q[y].size() - 1]);
					q[y].ppb();
					p[i][y]--;
				}
				while (p[i][y] > 1 && q[b].size()){
					ans += abs (i - q[b][q[b].size() - 1]) + 1;
					q[b].ppb();
					p[i][y]--;
				}
				if (p[i][y] > 1){
					v[y].pb (i);
				}
			}
		}
//		cout << ans << ' ' << v.size() << '\n';
	}
	cout << ans << '\n';
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63