oj.uz

Submission #993610

# Submission time Handle Problem Language Result Execution time Memory
993610 2024-06-06T08:17:24 Z imarn Bitaro's travel (JOI23_travel) C++14
100 / 100
 231 ms 20796 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int mxn=2e5+5;
int n;
ll x[mxn]{0};
struct mntree{
    ll t[4*mxn]{0};
    void build(){
        for(int i=0;i<4*mxn;i++)t[i]=2e18;
    }
    void update(int i,int l,int r,int idx,ll v){
        if(r<idx||l>idx)return;
        if(l==r)return void(t[i]=v);
        int m=(l+r)>>1;update(2*i,l,m,idx,v);update(2*i+1,m+1,r,idx,v);
        t[i]=min(t[2*i],t[2*i+1]);
    }
    pair<pii,int>query1(int i,int l,int r,int idx,ll v){
        if(r<idx)return {{1e9,1e9},1e9};
        if(l>=idx&&t[i]<=v)return {{l,r},i};
        else if(l>=idx&&t[i]>v)return {{1e9,1e9},1e9};
        int m=(l+r)>>1;
        return min(query1(2*i,l,m,idx,v),query1(2*i+1,m+1,r,idx,v));
    }
    int query(int i,int l,int r,ll v){
        if(l==r)return l;int m=(l+r)>>1;
        if(t[2*i]<=v)return query(2*i,l,m,v);
        else return query(2*i+1,m+1,r,v);
    }
    int cal(int i,ll v){
        pair<pii,int>res=query1(1,1,n,i,v);
        if(res.s==1e9)return n;
        return query(res.s,res.f.f,res.f.s,v);
    }
}sg1;
struct mxtree{
    ll t[4*mxn]{0};
    void build(){
        for(int i=0;i<4*mxn;i++)t[i]=-2e18;
    }
    void update(int i,int l,int r,int idx,ll v){
        if(r<idx||l>idx)return;
        if(l==r)return void(t[i]=v);
        int m=(l+r)>>1;update(2*i,l,m,idx,v);update(2*i+1,m+1,r,idx,v);
        t[i]=max(t[2*i],t[2*i+1]);
    }
    pair<pii,int>query1(int i,int l,int r,int idx,ll v){
        if(l>idx)return {{-1,-1},-1};
        if(r<=idx&&t[i]>v)return {{l,r},i};
        else if(r<=idx&&t[i]<=v)return {{-1,-1},-1};
        int m=(l+r)>>1;
        return max(query1(2*i,l,m,idx,v),query1(2*i+1,m+1,r,idx,v));
    }
    int query(int i,int l,int r,ll v){
        if(l==r)return l;int m=(l+r)>>1;
        if(t[2*i+1]>v)return query(2*i+1,m+1,r,v);
        else return query(2*i,l,m,v);
    }
    int cal(int i,ll v){
        pair<pii,int>res=query1(1,1,n,i,v);
        if(res.s==-1)return 1;
        return query(res.s,res.f.f,res.f.s,v);
    }
}sg2;
ll solve(int u){
    ll tt=0;
    int l=u,r=u;
    bool lef=1;
    while(l!=1||r!=n){
        if(l==1)return tt+x[n]-x[1];
        if(r==n)return tt+x[n]-x[1];
        if(lef){
            if(l==1)continue;
            int tl = sg2.cal(l,x[r+1]);
            tt +=x[r]-x[tl];l=tl;
        }
        else {
            if(r==n)continue;
            int tr = sg1.cal(r,x[l-1]);
            tt+=x[tr]-x[l];r=tr;
        }lef=!lef;
    }return tt;
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n;sg1.build();sg2.build();
    for(int i=1;i<=n;i++)cin>>x[i];x[0]=x[1],x[n+1]=x[n];
    for(int i=1;i<=n;i++){
        sg1.update(1,1,n,i,2*x[i]-x[i+1]);
        sg2.update(1,1,n,i,2*x[i]-x[i-1]);
    }int q;cin>>q;
    while(q--){
        ll y;cin>>y;
        int id = lower_bound(x+1,x+n+1,y)-x;
        if(id==n+1)cout<<solve(n)+y-x[n]<<'\n';
        else if(id==1)cout<<solve(1)+x[1]-y<<'\n';
        else{
            if(x[id]-y<y-x[id-1])cout<<x[id]-y+solve(id)<<'\n';
            else cout<<y-x[id-1]+solve(id-1)<<'\n';
        }
    }
}

//left find max l such that       a[l]-a[l-1]>=a[r+1]-a[l]
//right find min r such that      a[r+1]-a[r]>=a[r]-a[l-1]

Compilation message

travel.cpp: In member function 'int mntree::query(int, int, int, long long int)':
travel.cpp:31:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   31 |         if(l==r)return l;int m=(l+r)>>1;
      |         ^~
travel.cpp:31:26: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   31 |         if(l==r)return l;int m=(l+r)>>1;
      |                          ^~~
travel.cpp: In member function 'int mxtree::query(int, int, int, long long int)':
travel.cpp:60:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   60 |         if(l==r)return l;int m=(l+r)>>1;
      |         ^~
travel.cpp:60:26: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   60 |         if(l==r)return l;int m=(l+r)>>1;
      |                          ^~~
travel.cpp: In function 'int main()':
travel.cpp:92:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   92 |     for(int i=1;i<=n;i++)cin>>x[i];x[0]=x[1],x[n+1]=x[n];
      |     ^~~
travel.cpp:92:36: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   92 |     for(int i=1;i<=n;i++)cin>>x[i];x[0]=x[1],x[n+1]=x[n];
      |                                    ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12892 KB Output is correct
2 Correct 2 ms 12892 KB Output is correct
3 Correct 2 ms 12892 KB Output is correct
4 Correct 2 ms 12892 KB Output is correct
5 Correct 2 ms 12984 KB Output is correct
6 Correct 2 ms 12892 KB Output is correct
7 Correct 2 ms 12892 KB Output is correct
8 Correct 2 ms 12892 KB Output is correct
9 Correct 2 ms 12892 KB Output is correct
10 Correct 2 ms 12892 KB Output is correct
11 Correct 2 ms 12892 KB Output is correct
12 Correct 2 ms 12892 KB Output is correct
13 Correct 2 ms 12888 KB Output is correct
14 Correct 3 ms 12892 KB Output is correct
15 Correct 3 ms 12780 KB Output is correct
16 Correct 3 ms 12888 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12892 KB Output is correct
2 Correct 2 ms 12892 KB Output is correct
3 Correct 2 ms 12892 KB Output is correct
4 Correct 2 ms 12892 KB Output is correct
5 Correct 2 ms 12984 KB Output is correct
6 Correct 2 ms 12892 KB Output is correct
7 Correct 2 ms 12892 KB Output is correct
8 Correct 2 ms 12892 KB Output is correct
9 Correct 2 ms 12892 KB Output is correct
10 Correct 2 ms 12892 KB Output is correct
11 Correct 2 ms 12892 KB Output is correct
12 Correct 2 ms 12892 KB Output is correct
13 Correct 2 ms 12888 KB Output is correct
14 Correct 3 ms 12892 KB Output is correct
15 Correct 3 ms 12780 KB Output is correct
16 Correct 3 ms 12888 KB Output is correct
17 Correct 43 ms 16476 KB Output is correct
18 Correct 45 ms 16460 KB Output is correct
19 Correct 45 ms 16220 KB Output is correct
20 Correct 45 ms 16256 KB Output is correct
21 Correct 44 ms 16372 KB Output is correct
22 Correct 43 ms 16476 KB Output is correct
23 Correct 44 ms 16464 KB Output is correct
24 Correct 42 ms 16348 KB Output is correct
25 Correct 41 ms 16476 KB Output is correct
26 Correct 43 ms 16464 KB Output is correct
27 Correct 43 ms 16220 KB Output is correct
28 Correct 43 ms 16460 KB Output is correct
29 Correct 43 ms 16320 KB Output is correct
30 Correct 52 ms 16292 KB Output is correct
31 Correct 43 ms 16388 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12892 KB Output is correct
2 Correct 2 ms 12976 KB Output is correct
3 Correct 2 ms 12892 KB Output is correct
4 Correct 2 ms 12752 KB Output is correct
5 Correct 2 ms 12892 KB Output is correct
6 Correct 3 ms 12748 KB Output is correct
7 Correct 137 ms 18256 KB Output is correct
8 Correct 122 ms 18260 KB Output is correct
9 Correct 118 ms 18256 KB Output is correct
10 Correct 141 ms 18224 KB Output is correct
11 Correct 118 ms 18256 KB Output is correct
12 Correct 124 ms 18256 KB Output is correct
13 Correct 31 ms 16740 KB Output is correct
14 Correct 21 ms 14172 KB Output is correct
15 Correct 116 ms 19284 KB Output is correct
16 Correct 117 ms 19536 KB Output is correct
17 Correct 114 ms 19372 KB Output is correct
18 Correct 28 ms 16732 KB Output is correct

Subtask #4
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 12892 KB Output is correct
2 Correct 2 ms 12892 KB Output is correct
3 Correct 2 ms 12892 KB Output is correct
4 Correct 2 ms 12892 KB Output is correct
5 Correct 2 ms 12984 KB Output is correct
6 Correct 2 ms 12892 KB Output is correct
7 Correct 2 ms 12892 KB Output is correct
8 Correct 2 ms 12892 KB Output is correct
9 Correct 2 ms 12892 KB Output is correct
10 Correct 2 ms 12892 KB Output is correct
11 Correct 2 ms 12892 KB Output is correct
12 Correct 2 ms 12892 KB Output is correct
13 Correct 2 ms 12888 KB Output is correct
14 Correct 3 ms 12892 KB Output is correct
15 Correct 3 ms 12780 KB Output is correct
16 Correct 3 ms 12888 KB Output is correct
17 Correct 43 ms 16476 KB Output is correct
18 Correct 45 ms 16460 KB Output is correct
19 Correct 45 ms 16220 KB Output is correct
20 Correct 45 ms 16256 KB Output is correct
21 Correct 44 ms 16372 KB Output is correct
22 Correct 43 ms 16476 KB Output is correct
23 Correct 44 ms 16464 KB Output is correct
24 Correct 42 ms 16348 KB Output is correct
25 Correct 41 ms 16476 KB Output is correct
26 Correct 43 ms 16464 KB Output is correct
27 Correct 43 ms 16220 KB Output is correct
28 Correct 43 ms 16460 KB Output is correct
29 Correct 43 ms 16320 KB Output is correct
30 Correct 52 ms 16292 KB Output is correct
31 Correct 43 ms 16388 KB Output is correct
32 Correct 2 ms 12892 KB Output is correct
33 Correct 2 ms 12976 KB Output is correct
34 Correct 2 ms 12892 KB Output is correct
35 Correct 2 ms 12752 KB Output is correct
36 Correct 2 ms 12892 KB Output is correct
37 Correct 3 ms 12748 KB Output is correct
38 Correct 137 ms 18256 KB Output is correct
39 Correct 122 ms 18260 KB Output is correct
40 Correct 118 ms 18256 KB Output is correct
41 Correct 141 ms 18224 KB Output is correct
42 Correct 118 ms 18256 KB Output is correct
43 Correct 124 ms 18256 KB Output is correct
44 Correct 31 ms 16740 KB Output is correct
45 Correct 21 ms 14172 KB Output is correct
46 Correct 116 ms 19284 KB Output is correct
47 Correct 117 ms 19536 KB Output is correct
48 Correct 114 ms 19372 KB Output is correct
49 Correct 28 ms 16732 KB Output is correct
50 Correct 231 ms 20584 KB Output is correct
51 Correct 215 ms 20796 KB Output is correct
52 Correct 201 ms 20540 KB Output is correct
53 Correct 174 ms 20564 KB Output is correct
54 Correct 172 ms 20368 KB Output is correct
55 Correct 180 ms 20528 KB Output is correct
56 Correct 100 ms 20412 KB Output is correct
57 Correct 124 ms 20400 KB Output is correct
58 Correct 97 ms 20308 KB Output is correct