oj.uz

Submission #1109863

# Submission time Handle Problem Language Result Execution time Memory
1109863 2024-11-08T01:16:30 Z Zero_OP Passport (JOI23_passport) C++14
100 / 100
 543 ms 89780 KB 
#include <bits/stdc++.h>

using namespace std;

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

#ifdef LOCAL
    freopen("task.inp", "r", stdin);
    freopen("task.out", "w", stdout);
#endif // LOCAL

    int N;
    cin >> N;

    vector<vector<pair<int, int>>> adj(N * 4);
    vector<int> ln(N * 4), rn(N * 4);

    int n = N;
    function<int(int, int)> build = [&](int l, int r){
        if(l == r) return l;
        int mid = l + r >> 1;

        int o = n++, lc = build(l, mid), rc = build(mid + 1, r);
        ln[o] = lc;
        rn[o] = rc;
        adj[lc].emplace_back(o, 0);
        adj[rc].emplace_back(o, 0);
        return o;
    };

    function<void(int, int, int, int, int, int)> addEdge = [&](
        int cur, int l, int r, int u, int v, int s){
        if(u <= l && r <= v){
            adj[cur].emplace_back(s, 1);
        } else{
            int mid = l + r >> 1;
            if(u <= mid) addEdge(ln[cur], l, mid, u, v, s);
            if(mid < v) addEdge(rn[cur], mid + 1, r, u, v, s);
        }
    };

    int rt = build(0, N - 1);
    for(int i = 0; i < N; ++i){
        int l, r;
        cin >> l >> r;
        --l, --r;
        addEdge(rt, 0, N - 1, l, r, i);
    }

    auto bfs_deque = [&](int s, vector<vector<pair<int, int>>>& adj) -> vector<int>{
        vector<int> dist(4 * N, -1);
        dist[s] = 0;
        deque<int> dq;

        dq.push_back(s);
        while(!dq.empty()){
            int u = dq.front(); dq.pop_front();

            for(auto [v, w] : adj[u]){
                if(dist[v] == -1){
                    dist[v] = dist[u] + w;
                    if(w == 0) dq.push_front(v);
                    else dq.push_back(v);
                }
            }
        }

        return dist;
    };

    vector<int> distS = bfs_deque(0, adj), distT = bfs_deque(N - 1, adj);
    priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq;

    vector<int> answer(N * 4, -1);
    for(int i = 0; i < N; ++i){
        if(distS[i] != -1 && distT[i] != -1){
            answer[i] = max(1, distS[i]) + max(1, distT[i]) - 1;
            pq.push(make_pair(answer[i], i));
        }
    }

    while(!pq.empty()){
        int cur, u;
        tie(cur, u) = pq.top(); pq.pop();

        for(auto [v, w] : adj[u]){
            if(answer[v] == -1 || answer[v] > answer[u] + w){
                answer[v] = answer[u] + w;
                pq.push(make_pair(answer[v], v));
            }
        }
    }

    int Q;
    cin >> Q;
    while(Q--){
        int u;
        cin >> u;
        --u;
        cout << answer[u] << '\n';
    }

    return 0;
}

Compilation message

passport.cpp: In lambda function:
passport.cpp:22:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   22 |         int mid = l + r >> 1;
      |                   ~~^~~
passport.cpp: In lambda function:
passport.cpp:37:25: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   37 |             int mid = l + r >> 1;
      |                       ~~^~~
passport.cpp: In lambda function:
passport.cpp:60:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   60 |             for(auto [v, w] : adj[u]){
      |                      ^
passport.cpp: In function 'int main()':
passport.cpp:87:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   87 |         for(auto [v, w] : adj[u]){
      |                  ^

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 456 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 500 ms 80716 KB Output is correct
5 Correct 230 ms 60860 KB Output is correct
6 Correct 147 ms 56000 KB Output is correct
7 Correct 98 ms 53944 KB Output is correct
8 Correct 104 ms 51128 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 504 KB Output is correct
9 Correct 1 ms 592 KB Output is correct
10 Correct 1 ms 504 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 2 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 504 KB Output is correct
9 Correct 1 ms 592 KB Output is correct
10 Correct 1 ms 504 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 2 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 4 ms 1096 KB Output is correct
17 Correct 4 ms 1104 KB Output is correct
18 Correct 5 ms 1360 KB Output is correct
19 Correct 4 ms 1360 KB Output is correct
20 Correct 3 ms 1104 KB Output is correct
21 Correct 3 ms 1104 KB Output is correct
22 Correct 2 ms 1104 KB Output is correct
23 Correct 3 ms 1104 KB Output is correct
24 Correct 3 ms 1104 KB Output is correct

Subtask #4
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 504 KB Output is correct
9 Correct 1 ms 592 KB Output is correct
10 Correct 1 ms 504 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 2 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 4 ms 1096 KB Output is correct
17 Correct 4 ms 1104 KB Output is correct
18 Correct 5 ms 1360 KB Output is correct
19 Correct 4 ms 1360 KB Output is correct
20 Correct 3 ms 1104 KB Output is correct
21 Correct 3 ms 1104 KB Output is correct
22 Correct 2 ms 1104 KB Output is correct
23 Correct 3 ms 1104 KB Output is correct
24 Correct 3 ms 1104 KB Output is correct
25 Correct 1 ms 456 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 6 ms 1116 KB Output is correct
28 Correct 4 ms 1104 KB Output is correct
29 Correct 3 ms 984 KB Output is correct
30 Correct 4 ms 1104 KB Output is correct
31 Correct 3 ms 1104 KB Output is correct

Subtask #5
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 456 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 500 ms 80716 KB Output is correct
5 Correct 230 ms 60860 KB Output is correct
6 Correct 147 ms 56000 KB Output is correct
7 Correct 98 ms 53944 KB Output is correct
8 Correct 104 ms 51128 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 504 KB Output is correct
17 Correct 1 ms 592 KB Output is correct
18 Correct 1 ms 504 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 2 ms 336 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 4 ms 1096 KB Output is correct
25 Correct 4 ms 1104 KB Output is correct
26 Correct 5 ms 1360 KB Output is correct
27 Correct 4 ms 1360 KB Output is correct
28 Correct 3 ms 1104 KB Output is correct
29 Correct 3 ms 1104 KB Output is correct
30 Correct 2 ms 1104 KB Output is correct
31 Correct 3 ms 1104 KB Output is correct
32 Correct 3 ms 1104 KB Output is correct
33 Correct 1 ms 456 KB Output is correct
34 Correct 1 ms 336 KB Output is correct
35 Correct 6 ms 1116 KB Output is correct
36 Correct 4 ms 1104 KB Output is correct
37 Correct 3 ms 984 KB Output is correct
38 Correct 4 ms 1104 KB Output is correct
39 Correct 3 ms 1104 KB Output is correct
40 Correct 543 ms 84368 KB Output is correct
41 Correct 280 ms 62904 KB Output is correct
42 Correct 388 ms 89780 KB Output is correct
43 Correct 317 ms 89628 KB Output is correct
44 Correct 160 ms 57784 KB Output is correct
45 Correct 194 ms 63800 KB Output is correct
46 Correct 87 ms 23092 KB Output is correct
47 Correct 227 ms 65376 KB Output is correct
48 Correct 235 ms 71640 KB Output is correct