oj.uz

Submission #741714

# Submission time Handle Problem Language Result Execution time Memory
741714 2023-05-14T16:26:30 Z arnold518 Bitaro's travel (JOI23_travel) C++17
100 / 100
 283 ms 11220 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 2e5;

int N, A[MAXN+10], Q;

struct SEG1
{
	int tree[MAXN*4+10];
	void init(int node, int tl, int tr)
	{
		if(tl==tr)
		{
			tree[node]=A[tl]+A[tl]-A[tl+1];
			return;
		}
		int mid=tl+tr>>1;
		init(node*2, tl, mid);
		init(node*2+1, mid+1, tr);
		tree[node]=min(tree[node*2], tree[node*2+1]);
	}
	int query(int node, int tl, int tr, int l, int r, int k)
	{
		if(r<tl || tr<l) return -1;
		if(l<=tl && tr<=r && tree[node]>k) return -1;
		if(tl==tr) return tl;
		int mid=tl+tr>>1, ret;
		ret=query(node*2, tl, mid, l, r, k);
		if(ret!=-1) return ret;
		ret=query(node*2+1, mid+1, tr, l, r, k);
		return ret;
	}
}seg1;

struct SEG2
{
	int tree[MAXN*4+10];
	void init(int node, int tl, int tr)
	{
		if(tl==tr)
		{
			tree[node]=A[tl]+A[tl]-A[tl-1];
			return;
		}
		int mid=tl+tr>>1;
		init(node*2, tl, mid);
		init(node*2+1, mid+1, tr);
		tree[node]=max(tree[node*2], tree[node*2+1]);
	}
	int query(int node, int tl, int tr, int l, int r, int k)
	{
		if(r<tl || tr<l) return -1;
		if(l<=tl && tr<=r && tree[node]<=k) return -1;
		if(tl==tr) return tl;
		int mid=tl+tr>>1, ret;
		ret=query(node*2+1, mid+1, tr, l, r, k);
		if(ret!=-1) return ret;
		ret=query(node*2, tl, mid, l, r, k);
		return ret;
	}
}seg2;

int main()
{
	scanf("%d", &N);
	for(int i=1; i<=N; i++) scanf("%d", &A[i]);
	A[0]=-1e9+100; A[N+1]=2e9+100;

	seg1.init(1, 1, N);
	seg2.init(1, 1, N);

	scanf("%d", &Q);
	while(Q--)
	{
		int x;
		ll ans=0;
		scanf("%d", &x);
		int t=lower_bound(A+1, A+N+1, x)-A;
		int l, r;
		if(x-A[t-1]<=A[t]-x) l=r=t-1, ans+=x-A[t-1];
		else l=r=t, ans+=A[t]-x;

		int d=0;
		while(!(l==1 && r==N))
		{
			//printf("%d %d : %lld\n", l, r, ans);
			if(l==1 || r==N) { ans+=A[N]-A[1]; break; }
			else if(d==0)
			{
				int t=seg1.query(1, 1, N, r, N, A[l-1]);
				if(t!=-1)
				{
					r=t;
					ans+=A[r]-A[l];
				}
			}
			else
			{
				int t=seg2.query(1, 1, N, 1, l, A[r+1]);
				if(t!=-1)
				{
					l=t;
					ans+=A[r]-A[l];
				}
			}
			d=1-d;
		}
		printf("%lld\n", ans);
	}
}

Compilation message

travel.cpp: In member function 'void SEG1::init(int, int, int)':
travel.cpp:22:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   22 |   int mid=tl+tr>>1;
      |           ~~^~~
travel.cpp: In member function 'int SEG1::query(int, int, int, int, int, int)':
travel.cpp:32:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   32 |   int mid=tl+tr>>1, ret;
      |           ~~^~~
travel.cpp: In member function 'void SEG2::init(int, int, int)':
travel.cpp:50:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   50 |   int mid=tl+tr>>1;
      |           ~~^~~
travel.cpp: In member function 'int SEG2::query(int, int, int, int, int, int)':
travel.cpp:60:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   60 |   int mid=tl+tr>>1, ret;
      |           ~~^~~
travel.cpp: In function 'int main()':
travel.cpp:70:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |  scanf("%d", &N);
      |  ~~~~~^~~~~~~~~~
travel.cpp:71:31: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |  for(int i=1; i<=N; i++) scanf("%d", &A[i]);
      |                          ~~~~~^~~~~~~~~~~~~
travel.cpp:77:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |  scanf("%d", &Q);
      |  ~~~~~^~~~~~~~~~
travel.cpp:82:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |   scanf("%d", &x);
      |   ~~~~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 304 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 308 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 316 KB Output is correct
16 Correct 1 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 304 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 308 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 316 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 26 ms 6284 KB Output is correct
18 Correct 26 ms 6572 KB Output is correct
19 Correct 35 ms 6712 KB Output is correct
20 Correct 27 ms 6636 KB Output is correct
21 Correct 26 ms 6676 KB Output is correct
22 Correct 30 ms 6876 KB Output is correct
23 Correct 25 ms 6412 KB Output is correct
24 Correct 32 ms 6476 KB Output is correct
25 Correct 26 ms 6688 KB Output is correct
26 Correct 28 ms 6732 KB Output is correct
27 Correct 26 ms 6636 KB Output is correct
28 Correct 26 ms 6732 KB Output is correct
29 Correct 26 ms 6460 KB Output is correct
30 Correct 25 ms 6568 KB Output is correct
31 Correct 24 ms 6620 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 304 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 161 ms 8848 KB Output is correct
8 Correct 159 ms 8804 KB Output is correct
9 Correct 170 ms 8508 KB Output is correct
10 Correct 155 ms 8848 KB Output is correct
11 Correct 187 ms 8872 KB Output is correct
12 Correct 164 ms 8752 KB Output is correct
13 Correct 57 ms 3988 KB Output is correct
14 Correct 38 ms 1356 KB Output is correct
15 Correct 133 ms 9704 KB Output is correct
16 Correct 150 ms 9664 KB Output is correct
17 Correct 130 ms 9804 KB Output is correct
18 Correct 57 ms 3676 KB Output is correct

Subtask #4
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 304 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 308 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 316 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 26 ms 6284 KB Output is correct
18 Correct 26 ms 6572 KB Output is correct
19 Correct 35 ms 6712 KB Output is correct
20 Correct 27 ms 6636 KB Output is correct
21 Correct 26 ms 6676 KB Output is correct
22 Correct 30 ms 6876 KB Output is correct
23 Correct 25 ms 6412 KB Output is correct
24 Correct 32 ms 6476 KB Output is correct
25 Correct 26 ms 6688 KB Output is correct
26 Correct 28 ms 6732 KB Output is correct
27 Correct 26 ms 6636 KB Output is correct
28 Correct 26 ms 6732 KB Output is correct
29 Correct 26 ms 6460 KB Output is correct
30 Correct 25 ms 6568 KB Output is correct
31 Correct 24 ms 6620 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 1 ms 304 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 161 ms 8848 KB Output is correct
39 Correct 159 ms 8804 KB Output is correct
40 Correct 170 ms 8508 KB Output is correct
41 Correct 155 ms 8848 KB Output is correct
42 Correct 187 ms 8872 KB Output is correct
43 Correct 164 ms 8752 KB Output is correct
44 Correct 57 ms 3988 KB Output is correct
45 Correct 38 ms 1356 KB Output is correct
46 Correct 133 ms 9704 KB Output is correct
47 Correct 150 ms 9664 KB Output is correct
48 Correct 130 ms 9804 KB Output is correct
49 Correct 57 ms 3676 KB Output is correct
50 Correct 260 ms 11212 KB Output is correct
51 Correct 283 ms 10480 KB Output is correct
52 Correct 242 ms 11188 KB Output is correct
53 Correct 198 ms 10752 KB Output is correct
54 Correct 194 ms 11220 KB Output is correct
55 Correct 232 ms 10644 KB Output is correct
56 Correct 129 ms 10424 KB Output is correct
57 Correct 131 ms 10796 KB Output is correct
58 Correct 124 ms 10724 KB Output is correct