oj.uz

Submission #917164

# Submission time Handle Problem Language Result Execution time Memory
917164 2024-01-27T10:53:00 Z huutuan Bitaro's travel (JOI23_travel) C++14
100 / 100
 169 ms 20744 KB 
#include<bits/stdc++.h>

using namespace std;

#define int long long
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define isz(x) ((int)x.size())
#define sumof(x) accumulate(all(x), 0ll)

const int N=2e5+10, inf=1e18;

struct Node{
   int val1, val2;
   Node (int t1=0, int t2=0){
      val1=t1;
      val2=t2;
   }
   Node operator+(Node &b){
      return Node(max(val1, b.val1), min(val2, b.val2));
   }
};

struct SegmentTree{
   int n;
   vector<Node> t;
   void init(int _n){
      n=_n;
      t.assign(4*n+1, Node());
   }
   void build(int k, int l, int r, int *a){
      if (l==r){
         t[k]=Node(a[l]*2-a[l-1], a[l]*2-a[l+1]);
         return;
      }
      int mid=(l+r)>>1;
      build(k<<1, l, mid, a);
      build(k<<1|1, mid+1, r, a);
      t[k]=t[k<<1]+t[k<<1|1];
   }
   int walk1(int k, int l, int r, int pos, int val){
      if (t[k].val1<=val || l>pos) return 1;
      if (l==r) return l;
      int mid=(l+r)>>1;
      if (t[k<<1|1].val1<=val) return walk1(k<<1, l, mid, pos, val);
      int tmp=walk1(k<<1|1, mid+1, r, pos, val);
      if (tmp==1) return walk1(k<<1, l, mid, pos, val);
      return tmp;
   }
   int walk2(int k, int l, int r, int pos, int val){
      if (t[k].val2>val || r<pos) return n;
      if (l==r) return l;
      int mid=(l+r)>>1;
      if (t[k<<1].val2>val) return walk2(k<<1|1, mid+1, r, pos, val);
      int tmp=walk2(k<<1, l, mid, pos, val);
      if (tmp==n) return walk2(k<<1|1, mid+1, r, pos, val);
      return tmp;
   }
} st;

int n, q, a[N];

void solve(){
   cin >> n;
   for (int i=1; i<=n; ++i) cin >> a[i];
   cin >> q;
   a[0]=-inf, a[n+1]=inf;
   st.init(n);
   st.build(1, 1, n, a);
   while (q--){
      int s; cin >> s;
      int ir=lower_bound(a+1, a+n+1, s)-a;
      int il=ir-1;
      int cur=s, ans=0;
      while (il>=1 || ir<=n){
         if (il>=1 && (ir>n || abs(cur-a[il])<=abs(cur-a[ir]))){
            int i=st.walk1(1, 1, n, il, a[ir]);
            ans+=abs(cur-a[i]);
            il=i-1;
            cur=a[i];
            // dist(i, i-1) > dist(i, ir)
            // a[i] - a[i-1] > a[ir] - a[i]
            // 2 a[i] - a[i-1] > a[ir]
            // tim i dau tien <= il
         }else{
            int i=st.walk2(1, 1, n, ir, a[il]);
            ans+=abs(cur-a[i]);
            ir=i+1;
            cur=a[i];
            // dist(il, i) <= dist(i, i+1)
            // a[i] - a[il] <= a[i+1] - a[i]
            // 2a[i] - a[i+1] <= a[il]
            // tim i dau tien >= ir
         }
      }
      cout << ans << '\n';
   }
}

int32_t main(){
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);
   int ntests=1;
   // cin >> ntests;
   for (int i=1; i<=ntests; ++i) solve();
   return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 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 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 600 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 1 ms 344 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 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 23 ms 16444 KB Output is correct
18 Correct 20 ms 16464 KB Output is correct
19 Correct 24 ms 16656 KB Output is correct
20 Correct 20 ms 16476 KB Output is correct
21 Correct 22 ms 16468 KB Output is correct
22 Correct 20 ms 16404 KB Output is correct
23 Correct 23 ms 16348 KB Output is correct
24 Correct 20 ms 16476 KB Output is correct
25 Correct 19 ms 16476 KB Output is correct
26 Correct 20 ms 16476 KB Output is correct
27 Correct 20 ms 16468 KB Output is correct
28 Correct 19 ms 16468 KB Output is correct
29 Correct 20 ms 16392 KB Output is correct
30 Correct 20 ms 16220 KB Output is correct
31 Correct 20 ms 16316 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 600 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 348 KB Output is correct
7 Correct 137 ms 18504 KB Output is correct
8 Correct 144 ms 18464 KB Output is correct
9 Correct 118 ms 18264 KB Output is correct
10 Correct 114 ms 18444 KB Output is correct
11 Correct 117 ms 18272 KB Output is correct
12 Correct 150 ms 18288 KB Output is correct
13 Correct 34 ms 4176 KB Output is correct
14 Correct 32 ms 1516 KB Output is correct
15 Correct 94 ms 19540 KB Output is correct
16 Correct 97 ms 19540 KB Output is correct
17 Correct 97 ms 19536 KB Output is correct
18 Correct 43 ms 4188 KB Output is correct

Subtask #4
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 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 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 23 ms 16444 KB Output is correct
18 Correct 20 ms 16464 KB Output is correct
19 Correct 24 ms 16656 KB Output is correct
20 Correct 20 ms 16476 KB Output is correct
21 Correct 22 ms 16468 KB Output is correct
22 Correct 20 ms 16404 KB Output is correct
23 Correct 23 ms 16348 KB Output is correct
24 Correct 20 ms 16476 KB Output is correct
25 Correct 19 ms 16476 KB Output is correct
26 Correct 20 ms 16476 KB Output is correct
27 Correct 20 ms 16468 KB Output is correct
28 Correct 19 ms 16468 KB Output is correct
29 Correct 20 ms 16392 KB Output is correct
30 Correct 20 ms 16220 KB Output is correct
31 Correct 20 ms 16316 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 600 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 348 KB Output is correct
38 Correct 137 ms 18504 KB Output is correct
39 Correct 144 ms 18464 KB Output is correct
40 Correct 118 ms 18264 KB Output is correct
41 Correct 114 ms 18444 KB Output is correct
42 Correct 117 ms 18272 KB Output is correct
43 Correct 150 ms 18288 KB Output is correct
44 Correct 34 ms 4176 KB Output is correct
45 Correct 32 ms 1516 KB Output is correct
46 Correct 94 ms 19540 KB Output is correct
47 Correct 97 ms 19540 KB Output is correct
48 Correct 97 ms 19536 KB Output is correct
49 Correct 43 ms 4188 KB Output is correct
50 Correct 162 ms 20416 KB Output is correct
51 Correct 169 ms 20460 KB Output is correct
52 Correct 155 ms 20404 KB Output is correct
53 Correct 149 ms 20580 KB Output is correct
54 Correct 129 ms 20372 KB Output is correct
55 Correct 150 ms 20580 KB Output is correct
56 Correct 88 ms 20304 KB Output is correct
57 Correct 72 ms 20304 KB Output is correct
58 Correct 75 ms 20744 KB Output is correct