oj.uz

Submission #888874

# Submission time Handle Problem Language Result Execution time Memory
888874 2023-12-18T10:06:22 Z viwlesxq Passport (JOI23_passport) C++17
22 / 100
 2000 ms 49500 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;
}

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

    int n; cin >> n;
    vector <int> L(n), R(n);
    for ( int i = 0; i < n; i++ ){
        cin >> L[i] >> R[i];
        --L[i], --R[i];
    }
    int qq; cin >> qq;
    while ( qq-- ){
        int s; cin >> s;
        --s;
        if ( !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;
            continue;
        }
        const int inf = 1e15;
        vector <vector<int>> dp(n, vector <int> (n, inf));
        dp[L[s]][R[s]] = 1;
        queue <ar<int,2>> q;
        q.push({L[s], R[s]});
        while ( !q.empty() ){
            auto [u, v] = q.front();
            q.pop();
            for ( int j = u; j <= v; j++ ){
                int x = min(u, L[j]), y = max(v, R[j]);
                if ( chmin(dp[x][y], dp[u][v] + 1) ){
                    q.push({x, y});
                }
            }
        }
        int ans = dp[0][n - 1];
        if ( ans == inf ){
            ans = -1;
        }
        cout << ans << ln;
    }

    cout << '\n';
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 41 ms 5704 KB Output is correct
5 Correct 30 ms 5588 KB Output is correct
6 Correct 24 ms 3420 KB Output is correct
7 Correct 24 ms 5680 KB Output is correct
8 Correct 18 ms 4060 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 504 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 2 ms 1116 KB Output is correct
12 Correct 2 ms 1116 KB Output is correct
13 Correct 1 ms 1116 KB Output is correct
14 Correct 2 ms 860 KB Output is correct
15 Correct 4 ms 1116 KB Output is correct

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 504 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 2 ms 1116 KB Output is correct
12 Correct 2 ms 1116 KB Output is correct
13 Correct 1 ms 1116 KB Output is correct
14 Correct 2 ms 860 KB Output is correct
15 Correct 4 ms 1116 KB Output is correct
16 Correct 1723 ms 47344 KB Output is correct
17 Correct 844 ms 48976 KB Output is correct
18 Correct 37 ms 49496 KB Output is correct
19 Correct 43 ms 46680 KB Output is correct
20 Execution timed out 2083 ms 49500 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 504 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 2 ms 1116 KB Output is correct
12 Correct 2 ms 1116 KB Output is correct
13 Correct 1 ms 1116 KB Output is correct
14 Correct 2 ms 860 KB Output is correct
15 Correct 4 ms 1116 KB Output is correct
16 Correct 1723 ms 47344 KB Output is correct
17 Correct 844 ms 48976 KB Output is correct
18 Correct 37 ms 49496 KB Output is correct
19 Correct 43 ms 46680 KB Output is correct
20 Execution timed out 2083 ms 49500 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 41 ms 5704 KB Output is correct
5 Correct 30 ms 5588 KB Output is correct
6 Correct 24 ms 3420 KB Output is correct
7 Correct 24 ms 5680 KB Output is correct
8 Correct 18 ms 4060 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 504 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 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 2 ms 1116 KB Output is correct
20 Correct 2 ms 1116 KB Output is correct
21 Correct 1 ms 1116 KB Output is correct
22 Correct 2 ms 860 KB Output is correct
23 Correct 4 ms 1116 KB Output is correct
24 Correct 1723 ms 47344 KB Output is correct
25 Correct 844 ms 48976 KB Output is correct
26 Correct 37 ms 49496 KB Output is correct
27 Correct 43 ms 46680 KB Output is correct
28 Execution timed out 2083 ms 49500 KB Time limit exceeded
29 Halted 0 ms 0 KB -