oj.uz

Submission #954214

# Submission time Handle Problem Language Result Execution time Memory
954214 2024-03-27T12:25:18 Z LCJLY Bitaro's travel (JOI23_travel) C++14
15 / 100
 147 ms 61168 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long 
#define ld long double
#define show(x,y) cout << y << " " << #x << endl;
#define show2(x,y,i,j) cout << y << " " << #x << "  " << j << " " << #i << endl;
#define show3(x,y,i,j,p,q) cout << y << " " << #x << "  " << j << " " << #i << "  " << q << " " << #p << endl;
#define show4(x,y) for(auto it:y) cout << it << " "; cout << #x << endl;
typedef pair<int,int>pii;
typedef pair<pii,pii>pi2;
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

struct SparseTable {
    vector<vector<int> > ST;
    int N, K;
    SparseTable(int _N, int a[]): N(_N) {
        K = MSB(N);
        ST.resize(K);
        ST[0] = vector<int>(a, a+N);
        for (int k = 1; k < K; ++k) 
            for (int i = 0; i+(1<<k) <= N; ++i) 
                ST[k].push_back( min(ST[k-1][i], ST[k-1][i+(1<<(k-1))]) ); 
    }

    inline int MSB(unsigned int x) { return 32-__builtin_clz(x); }
    
    int query(int x, int y) {
        int k = MSB(y-x+1) - 1;
        return min(ST[k][x], ST[k][y-(1<<k)+1]);            
    }
};

struct SparseTable2 {
    vector<vector<int> > ST;
    int N, K;
    SparseTable2(int _N, int a[]): N(_N) {
        K = MSB(N);
        ST.resize(K);
        ST[0] = vector<int>(a, a+N);
        for (int k = 1; k < K; ++k) 
            for (int i = 0; i+(1<<k) <= N; ++i) 
                ST[k].push_back( max(ST[k-1][i], ST[k-1][i+(1<<(k-1))]) ); 
    }

    inline int MSB(unsigned int x) { return 32-__builtin_clz(x); }
    
    int query(int x, int y) {
        int k = MSB(y-x+1) - 1;
        return max(ST[k][x], ST[k][y-(1<<k)+1]);            
    }
};


void solve(){
	int n;
	cin >> n;
	int arr[n+5];
	for(int x=1;x<=n;x++){
		cin >> arr[x];
	}
	arr[0]=-1e15;
	arr[n+1]=1e15;
	
	int r[n+5];
	int l[n+5];
	for(int x=1;x<=n;x++){
		l[x]=2*arr[x]-arr[x-1];
		r[x]=2*arr[x]-arr[x+1];
	}
	
	SparseTable2 st(n+2,l);
	SparseTable st2(n+2,r);
	
	int q;
	cin >> q;
	
	for(int x=0;x<q;x++){
		int index;
		cin >> index;
		
		int cur=0;
		int hold=lower_bound(arr,arr+n+2,index)-arr;
		if(index-arr[hold-1]<=arr[hold]-index) cur=hold-1;
		else cur=hold;
		
		int counter=abs(index-arr[cur]);
		
		bool amos=true;
		
		if(arr[cur]-arr[cur-1]<=arr[cur+1]-arr[cur]) amos=false;
		
		int left=cur;
		int right=cur;
		
		while(left>1&&right<n){
			if(amos){
				//venture right
				int target=arr[left-1];
				//modify
				
				//for(int y=cur+1;y<=n;y++){
					//right=y;
					//if(r[y]<=target) break;
				//}
				
				int lft=cur+1;
				int rgt=n;
				int mid;
				int best=rgt;
				
				while(lft<=rgt){
					//show2(lft,lft,rgt,rgt);
					mid=(lft+rgt)/2;
					if(st2.query(cur+1,mid)<=target){
						best=mid;
						rgt=mid-1;
					}
					else lft=mid+1;
				}
				
				right=best;
				
				
				//modify
				counter+=abs(arr[left-1]-arr[right]);
				counter+=abs(arr[right]-arr[cur]);
				cur=left-1;
				left--;
				amos=false;
			}
			else{
				//venture left
				int target=arr[right+1];
				
				//modify
				//for(int y=cur-1;y>=1;y--){
					//left=y;
					//if(l[y]>target) break;
				//}
				
				int lft=1;
				int rgt=cur-1;
				int mid;
				int best=lft;
				
				while(lft<=rgt){
					//show2(lft,lft,rgt,rgt);
					mid=(lft+rgt)/2;
					if(st.query(mid,cur-1)>target){
						best=mid;
						lft=mid+1;
					}
					else rgt=mid-1;
				}
				
				left=best;
				
				
				
				//modify
				counter+=abs(arr[left]-arr[right+1]);
				counter+=abs(arr[left]-arr[cur]);
				cur=right+1;
				right++;
				amos=true;
			}
		}
		if(left!=1){
			counter+=abs(arr[cur]-arr[1]);
		}	
		if(right!=n){
			counter+=abs(arr[cur]-arr[n]);
		}
		cout << counter << "\n";
	}
	
}	

/*
10
1 2 3 4 5 6 7 8 9 10
1
2
*/

int32_t main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int t=1;
	//cin >> t;
	while(t--){
		solve();
	}
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 604 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 62 ms 59344 KB Output is correct
18 Correct 61 ms 59376 KB Output is correct
19 Correct 61 ms 59488 KB Output is correct
20 Correct 61 ms 59520 KB Output is correct
21 Correct 61 ms 59480 KB Output is correct
22 Correct 62 ms 59472 KB Output is correct
23 Correct 60 ms 59484 KB Output is correct
24 Correct 61 ms 59472 KB Output is correct
25 Correct 62 ms 59640 KB Output is correct
26 Correct 62 ms 59308 KB Output is correct
27 Correct 61 ms 59508 KB Output is correct
28 Correct 60 ms 59304 KB Output is correct
29 Correct 61 ms 59516 KB Output is correct
30 Correct 65 ms 59520 KB Output is correct
31 Correct 61 ms 59532 KB Output is correct

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 600 KB Output is correct
7 Correct 122 ms 60884 KB Output is correct
8 Correct 123 ms 60748 KB Output is correct
9 Correct 124 ms 60836 KB Output is correct
10 Correct 126 ms 60924 KB Output is correct
11 Correct 140 ms 60764 KB Output is correct
12 Correct 125 ms 60744 KB Output is correct
13 Correct 33 ms 2388 KB Output is correct
14 Correct 23 ms 860 KB Output is correct
15 Incorrect 147 ms 61168 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #4
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 62 ms 59344 KB Output is correct
18 Correct 61 ms 59376 KB Output is correct
19 Correct 61 ms 59488 KB Output is correct
20 Correct 61 ms 59520 KB Output is correct
21 Correct 61 ms 59480 KB Output is correct
22 Correct 62 ms 59472 KB Output is correct
23 Correct 60 ms 59484 KB Output is correct
24 Correct 61 ms 59472 KB Output is correct
25 Correct 62 ms 59640 KB Output is correct
26 Correct 62 ms 59308 KB Output is correct
27 Correct 61 ms 59508 KB Output is correct
28 Correct 60 ms 59304 KB Output is correct
29 Correct 61 ms 59516 KB Output is correct
30 Correct 65 ms 59520 KB Output is correct
31 Correct 61 ms 59532 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 600 KB Output is correct
38 Correct 122 ms 60884 KB Output is correct
39 Correct 123 ms 60748 KB Output is correct
40 Correct 124 ms 60836 KB Output is correct
41 Correct 126 ms 60924 KB Output is correct
42 Correct 140 ms 60764 KB Output is correct
43 Correct 125 ms 60744 KB Output is correct
44 Correct 33 ms 2388 KB Output is correct
45 Correct 23 ms 860 KB Output is correct
46 Incorrect 147 ms 61168 KB Output isn't correct
47 Halted 0 ms 0 KB -