oj.uz

답안 #888949

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
888949 2023-12-18T12:58:39 Z Alihan_8 Passport (JOI23_passport) C++17
54 / 100
 2000 ms 290384 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;
}

const int inf = 1e15 + 1;

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

const int N = 2e5 + 1;

int S;

struct SegTree{
    int T[N * 4];
    SegTree(){
        for ( int i = 0; i < N * 4; i++ ){
            T[i] = inf;
        }
    }
    void upd(int v, int l, int r, int pos, int val){
        if ( l == r ){
            T[v] = val;
            return;
        }
        int md = (l + r) >> 1;
        if ( pos > md ){
            upd(v * 2 + 1, md + 1, r, pos, val);
        } else{
            upd(v * 2, l, md, pos, val);
        }
        T[v] = min(T[v * 2], T[v * 2 + 1]);
    };
    void upd(int pos, int val){
        upd(1, 0, S - 1, pos, val);
    }
    int get(int v, int l, int r, int tl, int tr){
        if ( l > tr or r < tl ){
            return inf;
        }
        if ( tl <= l && tr >= r ){
            return T[v];
        }
        int md = (l + r) >> 1;
        return min(get(v * 2, l, md, tl, tr), get(v * 2 + 1, md + 1, r, tl, tr));
    }
    int get(int l, int r){
        return get(1, 0, S - 1, l, r);
    }
} seg;

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

    int n; cin >> n;
    S = n;
    vector <int> L(n), R(n);
    for ( int i = 0; i < n; i++ ){
        cin >> L[i] >> R[i];
        --L[i], --R[i];
    }
    Sparse mn(L, 1), mx(R, -1);
    vector <int> p(n);
    iota(all(p), 0);
    sort(all(p), [&](int &x, int &y){
         return R[x] - L[x] > R[y] - L[y];
    });
    vector <unordered_map<int,int>> dp(n);
    dp[0][n - 1] = 0;
    auto dfs = [&](auto dfs, int l, int r) -> int{
        if ( dp[l].count(r) ){
            return dp[l][r];
        }
        int ret = inf, L_ = mn.get(l, r), R_ = mx.get(l, r);
        if ( R[R_] > r ){
            chmin(ret, dfs(dfs, min(L[R_], l), R[R_]) + 1);
        }
        if ( L[L_] < l ){
            chmin(ret, dfs(dfs, L[L_], max(r, R[L_])) + 1);
        }
        return dp[l][r] = min(seg.get(l, r), ret);
    };
    int q; cin >> q;
    int s; cin >> s;
    --s;
    if ( q == 1 && !s ){
        int ans = 0, lst = -1;
        bool flag = true;
        priority_queue <int> q;
        q.push(R[s]);
        for ( int i = 1; i < n; i++ ){
            if ( lst < i ){
                if ( q.empty() || q.top() < i ){
                    flag = false;
                    break;
                }
                lst = q.top();
                q.pop(); ++ans;
            } q.push(R[i]);
        }
        cout << (flag ? ans : -1) << ln;
        return 0;
    }
    vector <int> ans(n);
    for ( auto &i: p ){
        ans[i] = dfs(dfs, L[i], R[i]) + 1;
        seg.upd(i, ans[i]);
    } q--;
    cout << (ans[s] >= inf ? -1 : ans[s]) << ln;
    while ( q-- ){
        int x; cin >> x;
        --x;
        cout << (ans[x] >= inf ? -1 : ans[x]) << ln;
    }

    cout << '\n';
}

Compilation message

passport.cpp:37:12: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   37 |     Sparse(auto &a, int s){
      |            ^~~~
passport.cpp: In instantiation of 'Sparse::Sparse(auto:23&, long long int) [with auto:23 = std::vector<long long int>]':
passport.cpp:115:19:   required from here
passport.cpp:47:28: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   47 |             int k = 1 << i - 1;
      |                          ~~^~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 85 ms 88460 KB Output is correct
5 Correct 79 ms 89308 KB Output is correct
6 Correct 72 ms 89216 KB Output is correct
7 Correct 63 ms 89296 KB Output is correct
8 Correct 53 ms 72648 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6484 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 3 ms 7004 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 4 ms 7260 KB Output is correct

Subtask #3
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6484 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 3 ms 7004 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 4 ms 7260 KB Output is correct
16 Correct 4 ms 7772 KB Output is correct
17 Correct 100 ms 23892 KB Output is correct
18 Correct 4 ms 8024 KB Output is correct
19 Correct 4 ms 7768 KB Output is correct
20 Correct 780 ms 140840 KB Output is correct
21 Correct 159 ms 41576 KB Output is correct
22 Correct 3 ms 7768 KB Output is correct
23 Correct 3 ms 8024 KB Output is correct
24 Correct 4 ms 7820 KB Output is correct

Subtask #4
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6484 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6492 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 3 ms 7004 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 4 ms 7260 KB Output is correct
16 Correct 4 ms 7772 KB Output is correct
17 Correct 100 ms 23892 KB Output is correct
18 Correct 4 ms 8024 KB Output is correct
19 Correct 4 ms 7768 KB Output is correct
20 Correct 780 ms 140840 KB Output is correct
21 Correct 159 ms 41576 KB Output is correct
22 Correct 3 ms 7768 KB Output is correct
23 Correct 3 ms 8024 KB Output is correct
24 Correct 4 ms 7820 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 4 ms 7772 KB Output is correct
28 Correct 104 ms 23696 KB Output is correct
29 Correct 772 ms 141248 KB Output is correct
30 Correct 160 ms 41552 KB Output is correct
31 Correct 4 ms 7772 KB Output is correct

Subtask #5
0 / 46.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 85 ms 88460 KB Output is correct
5 Correct 79 ms 89308 KB Output is correct
6 Correct 72 ms 89216 KB Output is correct
7 Correct 63 ms 89296 KB Output is correct
8 Correct 53 ms 72648 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 2 ms 6484 KB Output is correct
11 Correct 2 ms 6492 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 2 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 2 ms 6492 KB Output is correct
19 Correct 2 ms 6748 KB Output is correct
20 Correct 3 ms 7004 KB Output is correct
21 Correct 2 ms 6748 KB Output is correct
22 Correct 2 ms 6748 KB Output is correct
23 Correct 4 ms 7260 KB Output is correct
24 Correct 4 ms 7772 KB Output is correct
25 Correct 100 ms 23892 KB Output is correct
26 Correct 4 ms 8024 KB Output is correct
27 Correct 4 ms 7768 KB Output is correct
28 Correct 780 ms 140840 KB Output is correct
29 Correct 159 ms 41576 KB Output is correct
30 Correct 3 ms 7768 KB Output is correct
31 Correct 3 ms 8024 KB Output is correct
32 Correct 4 ms 7820 KB Output is correct
33 Correct 2 ms 6492 KB Output is correct
34 Correct 2 ms 6492 KB Output is correct
35 Correct 4 ms 7772 KB Output is correct
36 Correct 104 ms 23696 KB Output is correct
37 Correct 772 ms 141248 KB Output is correct
38 Correct 160 ms 41552 KB Output is correct
39 Correct 4 ms 7772 KB Output is correct
40 Correct 309 ms 110512 KB Output is correct
41 Execution timed out 2057 ms 290384 KB Time limit exceeded
42 Halted 0 ms 0 KB -