oj.uz

Submission #794051

# Submission time Handle Problem Language Result Execution time Memory
794051 2023-07-26T08:58:40 Z vjudge1 Passport (JOI23_passport) C++17
46 / 100
 1683 ms 25264 KB 
#include<bits/stdc++.h>

using namespace std;
using ll = long long;

const int N = 3010;
const int INF = 1e9;

int n;
int dp[N][N];
int L[N], R[N];

vector<vector<int>> ans;
int recur(int l, int r) {
    if(l == 1 && r == n) ans[l][r] = 0;
    if(ans[l][r] != -1) return ans[l][r];
    ans[l][r] = INF;
    for(int i = l; i <= r; i++) {
        if(l <= L[i] && R[i] <= r) continue;
        ans[l][r] = min(ans[l][r], recur(min(l, L[i]), max(r, R[i])) + 1);
    }
    return ans[l][r];
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++)
        cin >> L[i] >> R[i];
    int mx[n + 1] = {};
    for(int i = 1; i <= n; i++) 
        mx[i] = max(mx[i - 1], R[i]);
    // if(n <= 300) {
    //     dp[1][n] = 0;
    //     for(int len = n - 1; len >= 1; len--) {
    //         for(int l = 1; l <= n - len + 1; l++) {
    //             int r = l + len - 1;
    //             dp[l][r] = INF;
    //             for(int i = l; i <= r; i++) {
    //                 dp[l][r] = min(dp[l][r], dp[min(l, L[i])][max(r, R[i])] + 1);
    //             } 
    //         }
    //     }   
    //     int q;
    //     cin >> q;
    //     while(q--) {
    //         int x;
    //         cin >> x;
    //         cout << (dp[x][x] == INF ? -1 : dp[x][x]) << '\n';
    //     }
    //     return 0;
    // }
    if(n <= 2500) {
        int q;
        cin >> q;
        int x;
        cin >> x;
        ans.resize(n + 10, vector<int>(n + 10, -1));
        int val = recur(x, x);
        cout << (val == INF ? -1 : val);
        return 0;
    }
    int q;
    cin >> q;
    int x, res = 0;
    cin >> x;
    while(x < n) {
        res++;
        if(mx[x] == x) {
            cout << -1;
            return 0;
        }
        x = max(x, mx[x]);
    }
    cout << res;
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 26 ms 4236 KB Output is correct
5 Correct 25 ms 4284 KB Output is correct
6 Correct 26 ms 4316 KB Output is correct
7 Correct 21 ms 3540 KB Output is correct
8 Correct 20 ms 3068 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 2 ms 596 KB Output is correct
12 Correct 2 ms 704 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 2 ms 708 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 2 ms 596 KB Output is correct
12 Correct 2 ms 704 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 2 ms 708 KB Output is correct
16 Correct 1297 ms 22032 KB Output is correct
17 Correct 523 ms 24788 KB Output is correct
18 Correct 21 ms 25044 KB Output is correct
19 Correct 34 ms 23892 KB Output is correct
20 Correct 1683 ms 25264 KB Output is correct
21 Correct 737 ms 25264 KB Output is correct
22 Correct 13 ms 25008 KB Output is correct
23 Correct 1388 ms 25188 KB Output is correct
24 Correct 702 ms 25104 KB Output is correct

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 2 ms 596 KB Output is correct
12 Correct 2 ms 704 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 2 ms 708 KB Output is correct
16 Correct 1297 ms 22032 KB Output is correct
17 Correct 523 ms 24788 KB Output is correct
18 Correct 21 ms 25044 KB Output is correct
19 Correct 34 ms 23892 KB Output is correct
20 Correct 1683 ms 25264 KB Output is correct
21 Correct 737 ms 25264 KB Output is correct
22 Correct 13 ms 25008 KB Output is correct
23 Correct 1388 ms 25188 KB Output is correct
24 Correct 702 ms 25104 KB Output is correct
25 Incorrect 1 ms 212 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 26 ms 4236 KB Output is correct
5 Correct 25 ms 4284 KB Output is correct
6 Correct 26 ms 4316 KB Output is correct
7 Correct 21 ms 3540 KB Output is correct
8 Correct 20 ms 3068 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 ms 596 KB Output is correct
20 Correct 2 ms 704 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 596 KB Output is correct
23 Correct 2 ms 708 KB Output is correct
24 Correct 1297 ms 22032 KB Output is correct
25 Correct 523 ms 24788 KB Output is correct
26 Correct 21 ms 25044 KB Output is correct
27 Correct 34 ms 23892 KB Output is correct
28 Correct 1683 ms 25264 KB Output is correct
29 Correct 737 ms 25264 KB Output is correct
30 Correct 13 ms 25008 KB Output is correct
31 Correct 1388 ms 25188 KB Output is correct
32 Correct 702 ms 25104 KB Output is correct
33 Incorrect 1 ms 212 KB Output isn't correct
34 Halted 0 ms 0 KB -