oj.uz

답안 #964981

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
964981 2024-04-17T23:05:50 Z MarwenElarbi Bitaro's travel (JOI23_travel) C++17
15 / 100
 542 ms 36924 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define vi vector<int>
#define ve vector
#define ll long long
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define onbit __builtin_popcount
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e18
#define eps 1e-7
#define eps1 1e-2
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
using namespace std;
using namespace __gnu_pbds;
template <class T>
using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll MOD = 1e9+7;
const int nax = 2e5+5;
const int MAX_VAL = 1e6+1;
double PI=3.14159265359;
int arx[8]={1,0,0,-1,-1,-1, 1, 1};
int ary[8]={0,1,-1, 0, 1,-1,-1, 1};
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
vector<int> tab(nax);
vector<int> nl(nax);
vector<int> nr(nax);
int lg[nax];
int spr[nax][19];
int spl[nax][19];
int ask_left(int l,int r){
    int cur=lg[r-l+1];
    return min(spl[l][cur],spl[r-(1<<cur)+1][cur]);
}
int ask_right(int l,int r){
    int cur=lg[r-l+1];
    //cout <<"ask"<<" "<<l<<" "<<r<<" "<<max(spr[l][cur],spr[r-(1<<cur)+1][cur])<<endl;
    //cout <<l<<" "<<r<<" "<<spr[1][cur]<<" "<<cur<<endl;
    return max(spr[l][cur],spr[r-(1<<cur)+1][cur]);
}
int main(){
    optimise;
    //setIO("dec");
    lg[1]=0;
    for (int i = 2; i < nax; ++i)
    {
        lg[i]=lg[i/2]+1;
    }
    int n;
    cin>>n;
    tab.resize(n);
    for (int i = 0; i < n; ++i)
    {
        cin>>tab[i];
    }
    nr[0]=tab[n-1];
    nl[n-1]=tab[0];
    spr[0][0]=nr[0];
    spl[n-1][0]=nl[0];
    for (int i = 0; i < n-1; ++i)
    {
        int cur=tab[i+1]-tab[i];
        int l=-1;
        int r=i;
        while(r-l>1){
            int mid=(r+l)/2;
            if(tab[i]-tab[mid]>=cur) l=mid;
            else r=mid; 
        }
        nl[i]=tab[r];
        spl[i][0]=nl[i];
        //cout <<nl[i]<<" ";
    }//cout <<endl;
    for (int i = n-1; i > 0; --i)
    {
        int cur=tab[i]-tab[i-1];
        int l=i;
        int r=n;
        while(r-l>1){
            int mid=(r+l)/2;
            if(tab[mid]-tab[i]<cur) l=mid;
            else r=mid; 
        }
        nr[i]=tab[l];
        spr[i][0]=nr[i];
        //if(i==132) cout <<nr[i]<<endl;
        //cout <<nr[i]<<" ";
    }//cout <<endl;
    for (int i = 1; i < 19; ++i)
    {
        //cout <<"3asba"<<endl;
        for (int j = 0; j+(1<<i) < n; ++j)
        {
            spl[j][i]=min(spl[j][i-1],spl[j+(1<<(i-1))][i-1]);
        }
        for (int j = 0; j+(1<<i)< n; j++)
        {
            spr[j][i]=max(spr[j][i-1],spr[j+(1<<(i-1))][i-1]);
        }
    }
    //cout <<spl[1000][0]<<" "<<nl[1000]<<endl;
    //cout <<ask_left(1000,1000)<<endl;
    int q;
    cin>>q;
    while(q--){
        //out <<"nea"<<endl;
        int x;
        cin>>x;
        long long ans=0;
        if(x>=tab[n-1]){
            cout <<x-tab[0]<<endl;
            continue;
        }else if(x<=tab[0]){
            cout <<tab[n-1]-x<<endl;
            continue;
        }
        int idx=upper_bound(tab.begin(),tab.end(),x)-tab.begin();
        bool test=false;
        if(tab[idx-1]==x) test=true;
        int cur;
        if(tab[idx]-x<x-tab[idx-1-test]){
            cur=1;
        }else{
            idx--;
            cur=0;
        }
        //cout <<idx<<endl;
        int lefty=x;
        int righty=x;
        while(lefty>tab[0]&&righty<tab[n-1]){
            //cout <<"new "<<lefty<<" "<<righty<<" "<<cur<<endl;
            if(cur==1){
                int l=idx-1;
                int r=n-1;
                while(r-l>1){
                    int mid=(r+l)/2;
                    if(ask_left(idx,mid)>=lefty) l=mid;
                    else r=mid;
                }
                //cout <<idx<<" "<<nl[r]<<" "<<lefty<<" "<<ask_left(idx,r)<<endl;
                ans+=tab[r]-lefty;
                righty=tab[r];
                idx=r;
                cur=0;
            }else{
                int l=0;
                int r=idx+1;
                while(r-l>1){
                    int mid=(r+l)/2;
                    if(ask_right(mid,idx)<=righty) r=mid;
                    else l=mid;
                    //cout <<ask_right(649,idx)<<" "<<l<<" "<<r<<endl;
                }
                //cout <<spr[idx][0]<<" "<<idx<<" "<<ask_right(l,idx)<<" "<<righty<<endl;
                ans+=righty-tab[l];
                lefty=tab[l];
                idx=l;
                cur=1;
            }
            //cout <<lefty<<" "<<ri if(!t--) break;
        }
        //cout <<ans<<" "<<lefty<<" "<<righty<<endl;
        if(righty<tab[n-1]) ans+=tab[n-1]-lefty;
        if(lefty>tab[0]) ans+=righty-tab[0];
        cout << ans<<endl;
    }
}

Compilation message

travel.cpp: In function 'void setIO(std::string)':
travel.cpp:36:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
travel.cpp:37:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5468 KB Output is correct
2 Correct 3 ms 5724 KB Output is correct
3 Correct 2 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5724 KB Output is correct
6 Correct 2 ms 5724 KB Output is correct
7 Correct 2 ms 5724 KB Output is correct
8 Correct 2 ms 5468 KB Output is correct
9 Correct 2 ms 5464 KB Output is correct
10 Correct 2 ms 5468 KB Output is correct
11 Correct 2 ms 5468 KB Output is correct
12 Correct 2 ms 5672 KB Output is correct
13 Correct 2 ms 5468 KB Output is correct
14 Correct 3 ms 5676 KB Output is correct
15 Correct 2 ms 5720 KB Output is correct
16 Correct 2 ms 5720 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5468 KB Output is correct
2 Correct 3 ms 5724 KB Output is correct
3 Correct 2 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5724 KB Output is correct
6 Correct 2 ms 5724 KB Output is correct
7 Correct 2 ms 5724 KB Output is correct
8 Correct 2 ms 5468 KB Output is correct
9 Correct 2 ms 5464 KB Output is correct
10 Correct 2 ms 5468 KB Output is correct
11 Correct 2 ms 5468 KB Output is correct
12 Correct 2 ms 5672 KB Output is correct
13 Correct 2 ms 5468 KB Output is correct
14 Correct 3 ms 5676 KB Output is correct
15 Correct 2 ms 5720 KB Output is correct
16 Correct 2 ms 5720 KB Output is correct
17 Correct 91 ms 34436 KB Output is correct
18 Correct 78 ms 34428 KB Output is correct
19 Correct 87 ms 34456 KB Output is correct
20 Correct 82 ms 34616 KB Output is correct
21 Correct 80 ms 34624 KB Output is correct
22 Correct 82 ms 34616 KB Output is correct
23 Correct 90 ms 34384 KB Output is correct
24 Correct 78 ms 34520 KB Output is correct
25 Correct 80 ms 34576 KB Output is correct
26 Correct 79 ms 34388 KB Output is correct
27 Correct 79 ms 34616 KB Output is correct
28 Correct 84 ms 34468 KB Output is correct
29 Correct 78 ms 34384 KB Output is correct
30 Correct 89 ms 34608 KB Output is correct
31 Correct 77 ms 34612 KB Output is correct

Subtask #3
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5464 KB Output is correct
2 Correct 2 ms 5620 KB Output is correct
3 Correct 2 ms 5468 KB Output is correct
4 Correct 2 ms 5468 KB Output is correct
5 Correct 2 ms 5468 KB Output is correct
6 Correct 2 ms 5468 KB Output is correct
7 Correct 451 ms 36328 KB Output is correct
8 Correct 446 ms 36220 KB Output is correct
9 Correct 456 ms 36332 KB Output is correct
10 Correct 453 ms 36100 KB Output is correct
11 Correct 471 ms 36220 KB Output is correct
12 Correct 496 ms 36352 KB Output is correct
13 Correct 258 ms 8732 KB Output is correct
14 Correct 261 ms 6748 KB Output is correct
15 Incorrect 542 ms 36924 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #4
0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5468 KB Output is correct
2 Correct 3 ms 5724 KB Output is correct
3 Correct 2 ms 5724 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5724 KB Output is correct
6 Correct 2 ms 5724 KB Output is correct
7 Correct 2 ms 5724 KB Output is correct
8 Correct 2 ms 5468 KB Output is correct
9 Correct 2 ms 5464 KB Output is correct
10 Correct 2 ms 5468 KB Output is correct
11 Correct 2 ms 5468 KB Output is correct
12 Correct 2 ms 5672 KB Output is correct
13 Correct 2 ms 5468 KB Output is correct
14 Correct 3 ms 5676 KB Output is correct
15 Correct 2 ms 5720 KB Output is correct
16 Correct 2 ms 5720 KB Output is correct
17 Correct 91 ms 34436 KB Output is correct
18 Correct 78 ms 34428 KB Output is correct
19 Correct 87 ms 34456 KB Output is correct
20 Correct 82 ms 34616 KB Output is correct
21 Correct 80 ms 34624 KB Output is correct
22 Correct 82 ms 34616 KB Output is correct
23 Correct 90 ms 34384 KB Output is correct
24 Correct 78 ms 34520 KB Output is correct
25 Correct 80 ms 34576 KB Output is correct
26 Correct 79 ms 34388 KB Output is correct
27 Correct 79 ms 34616 KB Output is correct
28 Correct 84 ms 34468 KB Output is correct
29 Correct 78 ms 34384 KB Output is correct
30 Correct 89 ms 34608 KB Output is correct
31 Correct 77 ms 34612 KB Output is correct
32 Correct 2 ms 5464 KB Output is correct
33 Correct 2 ms 5620 KB Output is correct
34 Correct 2 ms 5468 KB Output is correct
35 Correct 2 ms 5468 KB Output is correct
36 Correct 2 ms 5468 KB Output is correct
37 Correct 2 ms 5468 KB Output is correct
38 Correct 451 ms 36328 KB Output is correct
39 Correct 446 ms 36220 KB Output is correct
40 Correct 456 ms 36332 KB Output is correct
41 Correct 453 ms 36100 KB Output is correct
42 Correct 471 ms 36220 KB Output is correct
43 Correct 496 ms 36352 KB Output is correct
44 Correct 258 ms 8732 KB Output is correct
45 Correct 261 ms 6748 KB Output is correct
46 Incorrect 542 ms 36924 KB Output isn't correct
47 Halted 0 ms 0 KB -