oj.uz

Submission #766827

# Submission time Handle Problem Language Result Execution time Memory
766827 2023-06-26T07:51:47 Z dimash241 Passport (JOI23_passport) C++17
0 / 100
 1 ms 340 KB 
#include <cstdio>
#include <random>
#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <string>
#include <bitset>
#include <cstdio>
#include <limits>
#include <vector>
#include <climits>
#include <cstring>
#include <cstdlib>
#include <fstream>
#include <numeric>
#include <sstream>
#include <cassert>
#include <iomanip>
#include <iostream>
#include <algorithm>
#include <unordered_set>
#include <unordered_map>
#include <functional>
#include <chrono>


#define ll long long
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
using namespace std;

// вправо, вниз, влево, вверх
int dx[] = {0, 1, 0, -1};
int dy[] = {1, 0, -1, 0};

// ход конем
//int dx[] = {-2, -1, 1, 2, 2, 1, -1, -2};
//int dy[] = {1, 2, 2, 1, -1, -2, -2, -1};

mt19937 rnd(chrono::system_clock::now().time_since_epoch().count());
mt19937_64 rnd64(chrono::system_clock::now().time_since_epoch().count());
int rndInteger (int l, int r) {
    return uniform_int_distribution<int> (l, r)(rnd);
}

const int MOD = (int) 998244353;
const int N = (int) 1e6 + 7;


int n, q, l[N], r[N];
int ans[N], x[N];

int solve(int L, int R, bool rev = false) {
    if(rev) {
        for (int i = 1; i <= n; ++i) {
            l[i] = n - l[i] + 1;
            r[i] = n - r[i] + 1;
            swap(l[i], r[i]);
        }
    }

    int res = 1;

    while(R < n) {
        int max_r = R;
        for (int i = L; i <= R; ++i)
            max_r = max(max_r, r[i]);

        if(max_r == R) {
            return 1e9;
        }

        ++res;
        R = max_r;
    }

    if(L > 1) {
        L = n;
        for (int i = 1; i <= n; ++i)
            if(r[i] == n)
                L = min(L, l[i]);

        while(L > 1) {
            int min_l = L;
            for (int i = L; i <= n; ++i)
                min_l = max(min_l, l[i]);
            if(min_l == L)
                return 1e9;
            cout << "change: " << L << " -> " << min_l << endl;
            ++res;
            L = min_l;
        }
    }

    if(rev) {
        for (int i = 1; i <= n; ++i) {
            l[i] = n - l[i] + 1;
            r[i] = n - r[i] + 1;
            swap(l[i], r[i]);
        }
    }

    return res;
}

int main() {
#ifdef LOCAL
    freopen("in.txt", "r", stdin);
#endif

    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);

    cin >> n;
    for (int i = 1; i <= n; ++i)
        cin >> l[i] >> r[i];

    cin >> q;
    for (int i = 1; i <= q; ++i) {
        cin >> x[i];

        ans[i] = 1e9;
        ans[i] = min(ans[i], solve(l[x[i]], r[x[i]]));
        ans[i] = min(ans[i], solve(n - r[x[i]] + 1, n - l[x[i]] + 1, 1));
    }

    for (int i = 1; i <= q; ++i) {
        if(ans[i] > n) ans[i] = -1;
        cout << ans[i] << '\n';
    }

    return 0;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Incorrect 0 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Incorrect 1 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Incorrect 0 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -