oj.uz

Submission #923197

# Submission time Handle Problem Language Result Execution time Memory
923197 2024-02-06T20:24:37 Z denniskim Bitaro's travel (JOI23_travel) C++17
15 / 100
 196 ms 75496 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef __int128 lll;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pld;
#define MAX 9223372036854775807LL
#define MIN -9223372036854775807LL
#define INF 0x3f3f3f3f3f3f3f3f
#define fi first
#define se second
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); cout << fixed; cout.precision(10);
#define sp << " "
#define en << "\n"
#define compress(v) sort(v.begin(), v.end()), v.erase(unique(v.begin(), v.end()), v.end())

ll n;
ll a[200010];
ll q;
ll X;
ll gap1[200010], gap2[200010];
ll minn[2500010][21], maxx[2500010][21];

int main(void)
{
	fastio
	
	cin >> n;
	
	for(ll i = 1 ; i <= n ; i++)
		cin >> a[i];
	
	for(ll i = 2 ; i <= n ; i++)
		gap1[i] = 2 * a[i] - a[i - 1];
	
	gap1[1] = INF / n;
	
	for(ll i = 1 ; i < n ; i++)
		gap2[i] = 2 * a[i] - a[i + 1];
	
	gap2[n] = -INF / n;
	
	for(ll i = 1 ; i <= n ; i++)
		minn[i][0] = gap2[i], maxx[i][0] = gap1[i];
	
	for(ll i = 1 ; i <= 20 ; i++)
	{
		for(ll j = 1 ; j <= n ; j++)
		{
			ll L = max(1LL, j - (1LL << (i - 1)));
			ll R = min(n, j + (1LL << (i - 1)));
			
			minn[j][i] = min(minn[j][i - 1], minn[R][i - 1]);
			maxx[j][i] = max(maxx[j][i - 1], maxx[L][i - 1]);
		}
	}
	
	cin >> q;
	
	while(q--)
	{
		cin >> X;
		
		if(n == 1)
		{
			cout << abs(X - a[1]) en;
			continue;
		}
		
		ll st = 0;
		ll ans = 0;
		
		if(X <= a[1])
			st = 1, ans += a[1] - X;
		else if(X >= a[n])
			st = n, ans += X - a[n];
		
		else
		{
			ll idx = lower_bound(a + 1, a + 1 + n, X) - a;
			ll idx2 = idx - 1;
			
			if(X - a[idx2] <= a[idx] - X)
				st = idx2, ans += X - a[idx2];
			else
				st = idx, ans += a[idx] - X;
		}
		
		ll L = st, R = st;
		ll D;
		
		if(st == 1)
			D = 1;
		else if(st == n)
			D = -1;
		
		else
		{
			if(a[st] - a[st - 1] <= a[st + 1] - a[st])
				D = -1;
			else
				D = 1;
		}
		
		while(1)
		{
			if(L <= 1)
			{
				if(D == 1)
					ans += a[n] - a[R];
				else
					ans += a[n] - a[1];
				
				break;
			}
			
			if(R >= n)
			{
				if(D == -1)
					ans += a[L] - a[1];
				else
					ans += a[n] - a[1];
				
				break;
			}
			
			if(D == -1)
			{
				ll XX = a[R + 1];
				ll now = L - 1;
				
				for(ll i = 20 ; i >= 0 ; i--)
				{
					if(maxx[now][i] <= XX)
						now -= (1LL << i);
				}
				
				ans += a[L] - a[now];
				ans += a[R + 1] - a[now];
				
				L = now, R = R + 1, D = 1;
			}
			
			else
			{
				ll XX = a[L - 1];
				ll now = R + 1;
				
				for(ll i = 20 ; i >= 0 ; i--)
				{
					if(minn[now][i] > XX)
						now += (1LL << i);
				}
				
				ans += a[now] - a[R];
				ans += a[now] - a[L - 1];
				
				L = L - 1, R = now, D = -1;
			}
		}
		
		cout << ans en;
	}
	
	return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 1 ms 8796 KB Output is correct
4 Correct 1 ms 8796 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 2 ms 9048 KB Output is correct
7 Correct 2 ms 8796 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6488 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 2 ms 8796 KB Output is correct
15 Correct 2 ms 8660 KB Output is correct
16 Correct 2 ms 8796 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 1 ms 8796 KB Output is correct
4 Correct 1 ms 8796 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 2 ms 9048 KB Output is correct
7 Correct 2 ms 8796 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6488 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 2 ms 8796 KB Output is correct
15 Correct 2 ms 8660 KB Output is correct
16 Correct 2 ms 8796 KB Output is correct
17 Correct 86 ms 73808 KB Output is correct
18 Correct 84 ms 73816 KB Output is correct
19 Correct 85 ms 73892 KB Output is correct
20 Correct 90 ms 74172 KB Output is correct
21 Correct 85 ms 73960 KB Output is correct
22 Correct 86 ms 73960 KB Output is correct
23 Correct 90 ms 73968 KB Output is correct
24 Correct 87 ms 73820 KB Output is correct
25 Correct 89 ms 73820 KB Output is correct
26 Correct 84 ms 73812 KB Output is correct
27 Correct 87 ms 73968 KB Output is correct
28 Correct 83 ms 73808 KB Output is correct
29 Correct 85 ms 73808 KB Output is correct
30 Correct 84 ms 73808 KB Output is correct
31 Correct 86 ms 73820 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6744 KB Output is correct
7 Incorrect 196 ms 75496 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #4
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 8796 KB Output is correct
3 Correct 1 ms 8796 KB Output is correct
4 Correct 1 ms 8796 KB Output is correct
5 Correct 2 ms 8796 KB Output is correct
6 Correct 2 ms 9048 KB Output is correct
7 Correct 2 ms 8796 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6488 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 2 ms 8796 KB Output is correct
15 Correct 2 ms 8660 KB Output is correct
16 Correct 2 ms 8796 KB Output is correct
17 Correct 86 ms 73808 KB Output is correct
18 Correct 84 ms 73816 KB Output is correct
19 Correct 85 ms 73892 KB Output is correct
20 Correct 90 ms 74172 KB Output is correct
21 Correct 85 ms 73960 KB Output is correct
22 Correct 86 ms 73960 KB Output is correct
23 Correct 90 ms 73968 KB Output is correct
24 Correct 87 ms 73820 KB Output is correct
25 Correct 89 ms 73820 KB Output is correct
26 Correct 84 ms 73812 KB Output is correct
27 Correct 87 ms 73968 KB Output is correct
28 Correct 83 ms 73808 KB Output is correct
29 Correct 85 ms 73808 KB Output is correct
30 Correct 84 ms 73808 KB Output is correct
31 Correct 86 ms 73820 KB Output is correct
32 Correct 1 ms 6492 KB Output is correct
33 Correct 1 ms 6492 KB Output is correct
34 Correct 1 ms 6492 KB Output is correct
35 Correct 1 ms 6492 KB Output is correct
36 Correct 1 ms 6492 KB Output is correct
37 Correct 1 ms 6744 KB Output is correct
38 Incorrect 196 ms 75496 KB Output isn't correct
39 Halted 0 ms 0 KB -