oj.uz

Submission #793847

# Submission time Handle Problem Language Result Execution time Memory
793847 2023-07-26T07:24:54 Z winter0101 Bitaro's travel (JOI23_travel) C++14
100 / 100
 288 ms 43948 KB 
#include<bits/stdc++.h>
using namespace std;
#define all(fl) fl.begin(),fl.end()
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define lb lower_bound
#define ub upper_bound
#define sz(a) (int)a.size()
#define pii pair<int,int>
#define pli pair<long long,int>
#define gcd __gcd
#define lcm(x,y) x*y/__gcd(x,y)
#define pil pair<int,long long>
#define pll pair<long long,long long>
#define eb emplace_back
const int maxn=2e5+9;
long long a[maxn];
long long b[maxn];
long long c[maxn];
int st1[maxn][21];
int st2[maxn][21];
long long get(int l,int r){
if (l==r)return 0;
return c[r]-c[l];
}
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("temp.INP","r",stdin);
    //freopen("temp.OUT","w",stdout);
    int n;
    cin>>n;
    for1(i,1,n){
    cin>>a[i];
    }
    for1(i,2,n){
    c[i]=c[i-1]+a[i]-a[i-1];
    }
    for1(i,1,n-1){
    //2*val[i]>sum-val[i]
    long long val=(a[i+1]-a[i])*2;
    int l=i+2,r=n;
    st1[i][0]=n+1;
    while (l<=r){
    int mid=(l+r)/2;
    //cout<<l<<" "<<r<<" "<<mid<<" "<<val<<'\n';
    if (get(i,mid)>=val){
    st1[i][0]=mid;
    r=mid-1;
    }
    else l=mid+1;
    }
    }
    //cout<<st1[1][0]<<'\n';
    st1[n+1][0]=n+1;
    st1[n][0]=n;
    for1(j,1,20){
    for1(i,1,n){
    if (i+(1<<j)-1>n)break;
    st1[i][j]=max(st1[i][j-1],st1[i+(1<<(j-1))][j-1]);
    }
    }
    st2[1][0]=1;
    for1(i,2,n){
    long long val=(a[i]-a[i-1])*2;
    int l=1,r=i-2;
    st2[i][0]=0;
    while (l<=r){
        int mid=(l+r)/2;
        if (get(mid,i)>val){
        st2[i][0]=mid;
        l=mid+1;
        }
        else r=mid-1;
    }
    }
    //cout<<st2[5][0];
    for1(j,1,20){
    for1(i,1,n){
    if (i+(1<<j)-1>n)break;
    st2[i][j]=min(st2[i][j-1],st2[i+(1<<(j-1))][j-1]);
    }
    }
    for1(i,1,n){
    int l=i,r=i,nw=i;
    while (true){
        if (l==1&&r==n)break;
        if (l==1){
        b[i]+=get(nw,n);
        break;
        }
        if (r==n){
        b[i]+=get(1,nw);
        break;
        }
        long long d1=get(l-1,nw),d2=get(nw,r+1);
        //cout<<l<<" "<<r<<'\n';
        if (d1<=d2){
        nw=l-1;
        //cout<<l<<"->"<<l-1<<'\n';
        l--;
        if (l==1){
            b[i]+=d1;
            continue;
        }
        int pos=nw;
        for2(j,20,0){
        if (pos-(1<<j)+1<=0)continue;
        if (st1[pos-(1<<j)+1][j]<=r+1){
            pos=(pos-(1<<j)+1);
        }
        }
        //cerr<<pos<<" "<<nw<<'\n';
        //if (pos>nw)cout<<"v";
        b[i]+=get(pos,nw)+d1;
        nw=pos;
        l=nw;
        }
        else {
        //cout<<r<<"->"<<r+1<<'\n';
        r++;
        nw=r;
        if (r==n){
            b[i]+=d2;
            continue;
        }
        int pos=nw;
        for2(j,20,0){
        if (pos+(1<<j)-1>n)continue;
        if (st2[pos][j]>=l-1){
            pos=pos+(1<<j)-1;
        }
        }
        b[i]+=get(nw,pos)+d2;
        //cout<<nw<<" "<<pos<<'\n';
        nw=pos;
        r=nw;
        }
    }
    //cout<<b[i]<<'\n';
    }
    int q;
    cin>>q;
    for1(i,1,q){
    int x;
    cin>>x;
    //continue;
    if (x<=a[1])cout<<b[1]+a[1]-x<<'\n';
    else if (x>=a[n])cout<<b[n]+x-a[n]<<'\n';
    else {
    int l=1,r=n,ans=1;
    while (l<=r){
        int mid=(l+r)/2;
        if (a[mid]<=x){
            ans=mid;
            l=mid+1;
        }
        else r=mid-1;
    }
    long long d1=x-a[ans],d2=a[ans+1]-x;
    if (d1<=d2){
        cout<<d1+b[ans]<<'\n';
    }
    else cout<<d2+b[ans+1]<<'\n';
    }
    }

}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 724 KB Output is correct
16 Correct 1 ms 724 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 724 KB Output is correct
16 Correct 1 ms 724 KB Output is correct
17 Correct 148 ms 37808 KB Output is correct
18 Correct 148 ms 39744 KB Output is correct
19 Correct 155 ms 39784 KB Output is correct
20 Correct 147 ms 39784 KB Output is correct
21 Correct 140 ms 39792 KB Output is correct
22 Correct 141 ms 39812 KB Output is correct
23 Correct 138 ms 39820 KB Output is correct
24 Correct 105 ms 39744 KB Output is correct
25 Correct 107 ms 39712 KB Output is correct
26 Correct 109 ms 39792 KB Output is correct
27 Correct 120 ms 39800 KB Output is correct
28 Correct 105 ms 39756 KB Output is correct
29 Correct 250 ms 39684 KB Output is correct
30 Correct 240 ms 39748 KB Output is correct
31 Correct 247 ms 39704 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 125 ms 39264 KB Output is correct
8 Correct 119 ms 41804 KB Output is correct
9 Correct 120 ms 41832 KB Output is correct
10 Correct 121 ms 41748 KB Output is correct
11 Correct 143 ms 41760 KB Output is correct
12 Correct 120 ms 41804 KB Output is correct
13 Correct 32 ms 4136 KB Output is correct
14 Correct 22 ms 1492 KB Output is correct
15 Correct 153 ms 42832 KB Output is correct
16 Correct 141 ms 42800 KB Output is correct
17 Correct 140 ms 42828 KB Output is correct
18 Correct 32 ms 4132 KB Output is correct

Subtask #4
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 724 KB Output is correct
15 Correct 1 ms 724 KB Output is correct
16 Correct 1 ms 724 KB Output is correct
17 Correct 148 ms 37808 KB Output is correct
18 Correct 148 ms 39744 KB Output is correct
19 Correct 155 ms 39784 KB Output is correct
20 Correct 147 ms 39784 KB Output is correct
21 Correct 140 ms 39792 KB Output is correct
22 Correct 141 ms 39812 KB Output is correct
23 Correct 138 ms 39820 KB Output is correct
24 Correct 105 ms 39744 KB Output is correct
25 Correct 107 ms 39712 KB Output is correct
26 Correct 109 ms 39792 KB Output is correct
27 Correct 120 ms 39800 KB Output is correct
28 Correct 105 ms 39756 KB Output is correct
29 Correct 250 ms 39684 KB Output is correct
30 Correct 240 ms 39748 KB Output is correct
31 Correct 247 ms 39704 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 0 ms 340 KB Output is correct
36 Correct 0 ms 340 KB Output is correct
37 Correct 0 ms 340 KB Output is correct
38 Correct 125 ms 39264 KB Output is correct
39 Correct 119 ms 41804 KB Output is correct
40 Correct 120 ms 41832 KB Output is correct
41 Correct 121 ms 41748 KB Output is correct
42 Correct 143 ms 41760 KB Output is correct
43 Correct 120 ms 41804 KB Output is correct
44 Correct 32 ms 4136 KB Output is correct
45 Correct 22 ms 1492 KB Output is correct
46 Correct 153 ms 42832 KB Output is correct
47 Correct 141 ms 42800 KB Output is correct
48 Correct 140 ms 42828 KB Output is correct
49 Correct 32 ms 4132 KB Output is correct
50 Correct 199 ms 43916 KB Output is correct
51 Correct 225 ms 43948 KB Output is correct
52 Correct 194 ms 43848 KB Output is correct
53 Correct 191 ms 43944 KB Output is correct
54 Correct 168 ms 43916 KB Output is correct
55 Correct 173 ms 43868 KB Output is correct
56 Correct 288 ms 43852 KB Output is correct
57 Correct 269 ms 43788 KB Output is correct
58 Correct 275 ms 43776 KB Output is correct