oj.uz

Submission #890919

# Submission time Handle Problem Language Result Execution time Memory
890919 2023-12-22T05:13:52 Z vjudge1 Bitaro's travel (JOI23_travel) C++17
100 / 100
 344 ms 75356 KB 
#include <bits/stdc++.h>

using namespace std;

#define all(x) x.begin(), x.end()
#define ar array
#define pb push_back
#define ln '\n'
#define int long long

using i64 = long long;

template <class F, class _S>
bool chmin(F &u, const _S &v){
    bool flag = false;
    if ( u > v ){
        u = v; flag |= true;
    }
    return flag;
}

template <class F, class _S>
bool chmax(F &u, const _S &v){
    bool flag = false;
    if ( u < v ){
        u = v; flag |= true;
    }
    return flag;
}

struct Sp{
    vector <vector<int>> T;
    int _s;
    Sp(auto &a, int s){
        _s = s;
        T.resize(20);
        int n = a.size();
        for ( auto &x: T ){
            x.resize(n);
        }
        T[0] = a;
        for ( auto &u: T[0] ) u *= _s;
        for ( int i = 1; i < 20; i++ ){
            int k = 1 << i - 1;
            for ( int j = 0; j < n; j++ ){
                T[i][j] = min(T[i - 1][j], T[i - 1][min(n - 1, j + k)]);
            }
        }
    }
    int get(int l, int r){
        int lg = __lg(r - l + 1), k = 1 << lg;
        return min(T[lg][l], T[lg][r - k + 1]) * _s;
    }
};

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n; cin >> n;
    vector <int> X(n);
    for ( auto &u: X ) cin >> u;
    int q; cin >> q;
    vector <int> S(q);
    for ( auto &u: S ) cin >> u;
    vector <int> df(n - 1), df2(n - 1);
    for ( int i = 0; i + 1 < n; i++ ){
        df[i] = X[i + 1] * 2 - X[i];
        df2[i] = X[i + 1] - X[i] * 2;
    }
    Sp sp(df, -1), ap(df2, -1);
    for ( auto &xx: S ){
        int it = lower_bound(all(X), xx) - X.begin();
        if ( it - 1 >= 0 && (it == n || X[it] - xx >= xx - X[it - 1]) ) --it;
        int ans = abs(X[it] - xx), l = it - 1, r = it + 1, x = X[it];
        while ( l >= 0 || r < n ){
//            cout << l + 1 << " " << r + 1 << " -> " << x << ", " << ans << ln;
            if ( l < 0 ){
                ans += abs(X.back() - x);
                break;
            } else if ( r >= n ){
                ans += abs(X[0] - x);
                break;
            } else{
                if ( abs(X[l] - x) <= abs(X[r] - x) ){
                    int tl = 0, tr = l;
                    while ( tl + 1 < tr ){
                        int md = (tl + tr) >> 1;
                        if ( sp.get(md, l - 1) - X[l] <= abs(X[r] - x) ){
                            tr = md;
                        } else tl = md;
                    }
                    ans += abs(X[tr] - x);
                    x = X[tr--]; l = tr;
                } else{
                    int tl = r - 1, tr = n - 1;
                    while ( tl + 1 < tr ){
                        int md = (tl + tr) >> 1;
                        if ( ap.get(r, md) + X[r] < abs(X[l] - x) ){
                            tl = md;
                        } else tr = md;
                    } tl++;
                    ans += abs(X[tr] - x);
                    x = X[tr++]; r = tr;
                }
            }
        }
        cout << ans << ln;
    }

    cout << '\n';
}

Compilation message

travel.cpp:34:8: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   34 |     Sp(auto &a, int s){
      |        ^~~~
travel.cpp: In instantiation of 'Sp::Sp(auto:23&, long long int) [with auto:23 = std::vector<long long int>]':
travel.cpp:71:17:   required from here
travel.cpp:44:28: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   44 |             int k = 1 << i - 1;
      |                          ~~^~~

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 1116 KB Output is correct
3 Correct 1 ms 1116 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 0 ms 344 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 1116 KB Output is correct
15 Correct 1 ms 1116 KB Output is correct
16 Correct 1 ms 1116 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 1116 KB Output is correct
3 Correct 1 ms 1116 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 0 ms 344 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 1116 KB Output is correct
15 Correct 1 ms 1116 KB Output is correct
16 Correct 1 ms 1116 KB Output is correct
17 Correct 46 ms 67668 KB Output is correct
18 Correct 47 ms 67664 KB Output is correct
19 Correct 47 ms 67664 KB Output is correct
20 Correct 47 ms 67668 KB Output is correct
21 Correct 46 ms 67676 KB Output is correct
22 Correct 45 ms 67828 KB Output is correct
23 Correct 46 ms 67676 KB Output is correct
24 Correct 46 ms 67632 KB Output is correct
25 Correct 47 ms 67664 KB Output is correct
26 Correct 46 ms 67816 KB Output is correct
27 Correct 46 ms 67668 KB Output is correct
28 Correct 47 ms 67664 KB Output is correct
29 Correct 46 ms 67668 KB Output is correct
30 Correct 47 ms 67664 KB Output is correct
31 Correct 47 ms 67668 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 600 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 106 ms 70640 KB Output is correct
8 Correct 114 ms 70640 KB Output is correct
9 Correct 112 ms 70836 KB Output is correct
10 Correct 105 ms 70740 KB Output is correct
11 Correct 106 ms 70740 KB Output is correct
12 Correct 107 ms 70736 KB Output is correct
13 Correct 29 ms 3932 KB Output is correct
14 Correct 22 ms 2548 KB Output is correct
15 Correct 130 ms 71080 KB Output is correct
16 Correct 128 ms 71052 KB Output is correct
17 Correct 136 ms 71212 KB Output is correct
18 Correct 30 ms 3928 KB Output is correct

Subtask #4
55.0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 1116 KB Output is correct
3 Correct 1 ms 1116 KB Output is correct
4 Correct 1 ms 1116 KB Output is correct
5 Correct 1 ms 1116 KB Output is correct
6 Correct 1 ms 1116 KB Output is correct
7 Correct 1 ms 1116 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 0 ms 344 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 1116 KB Output is correct
15 Correct 1 ms 1116 KB Output is correct
16 Correct 1 ms 1116 KB Output is correct
17 Correct 46 ms 67668 KB Output is correct
18 Correct 47 ms 67664 KB Output is correct
19 Correct 47 ms 67664 KB Output is correct
20 Correct 47 ms 67668 KB Output is correct
21 Correct 46 ms 67676 KB Output is correct
22 Correct 45 ms 67828 KB Output is correct
23 Correct 46 ms 67676 KB Output is correct
24 Correct 46 ms 67632 KB Output is correct
25 Correct 47 ms 67664 KB Output is correct
26 Correct 46 ms 67816 KB Output is correct
27 Correct 46 ms 67668 KB Output is correct
28 Correct 47 ms 67664 KB Output is correct
29 Correct 46 ms 67668 KB Output is correct
30 Correct 47 ms 67664 KB Output is correct
31 Correct 47 ms 67668 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 600 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 106 ms 70640 KB Output is correct
39 Correct 114 ms 70640 KB Output is correct
40 Correct 112 ms 70836 KB Output is correct
41 Correct 105 ms 70740 KB Output is correct
42 Correct 106 ms 70740 KB Output is correct
43 Correct 107 ms 70736 KB Output is correct
44 Correct 29 ms 3932 KB Output is correct
45 Correct 22 ms 2548 KB Output is correct
46 Correct 130 ms 71080 KB Output is correct
47 Correct 128 ms 71052 KB Output is correct
48 Correct 136 ms 71212 KB Output is correct
49 Correct 30 ms 3928 KB Output is correct
50 Correct 344 ms 71544 KB Output is correct
51 Correct 308 ms 75244 KB Output is correct
52 Correct 277 ms 75356 KB Output is correct
53 Correct 198 ms 75344 KB Output is correct
54 Correct 216 ms 75256 KB Output is correct
55 Correct 194 ms 75348 KB Output is correct
56 Correct 100 ms 75084 KB Output is correct
57 Correct 100 ms 75092 KB Output is correct
58 Correct 100 ms 75328 KB Output is correct