oj.uz

Submission #459629

# Submission time Handle Problem Language Result Execution time Memory
459629 2021-08-08T21:03:19 Z TeaTime The Kingdom of JOIOI (JOI17_joioi) C++17
60 / 100
 4000 ms 65016 KB 
//#pragma GCC optimize("O3")
//#pragma GCC target("avx2")
#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <map>
#include <set>
#include <queue>
#include <unordered_map>

using namespace std;

#define fastInp cin.tie(0); cout.tie(0); ios_base::sync_with_stdio(0);

typedef int ll;
typedef long double ld;

const ll SZ = 2050, INF = 2e9;
ll grid[SZ][SZ], pt[SZ];
vector<tuple<ll, ll, ll>> vec;
ll n, m, mx;
pair<ll, ll> pos;

void inc(ll ht) {
    while (pt[ht + 1] < pt[ht] + 1) {
        inc(ht + 1);
        if (mx == INF) return;
    }

    if (make_pair(ht, pt[ht]) == pos) {
        mx = INF;
        pt[ht] = INF;
        return;
    }

    mx = max(mx, grid[ht][pt[ht]]);
    pt[ht]++;
}

ll find() {
    for (int i = 0; i < n; i++) pt[i] = 0;
    pt[n] = INF;

    mx = get<0>(vec[0]);
    pos = { get<1>(vec.back()), get<2>(vec.back()) };
    ll ans = INF, st = get<0>(vec.back());

    for (int i = 0; i < vec.size(); i++) {
        ll x = get<1>(vec[i]), y = get<2>(vec[i]);
        while (pt[x] <= y) {
            inc(x);
        }
        if (mx == INF) break;

        ans = min(ans, max(mx - get<0>(vec[0]), st - get<0>(vec[i + 1])));
    }
    return ans;
}

int main() {
    fastInp;

    cin >> n >> m;

    pair<ll, ll> cur = { INF, -INF };
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cin >> grid[i][j];
            cur.first = min(cur.first, grid[i][j]);
            cur.second = max(cur.second, grid[i][j]);
        }
    }

    for (int i = 0; i < n; i++) {
        pt[i] = 0;
        for (int j = 0; j < m; j++) {
            vec.push_back({ grid[i][j], i, j });
        }
    }

    sort(vec.begin(), vec.end());
    ll ans = (cur.second - cur.first);

    ans = min(ans, find());

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            ll snd = m - j - 1;
            if (j < snd) swap(grid[i][j], grid[i][snd]);
        }
    }
    for (auto& c : vec) get<2>(c) = m - get<2>(c) - 1;

    ans = min(ans, find());

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            ll snd = n - i - 1;
            if (i < snd) swap(grid[i][j], grid[snd][j]);
        }
    }
    for (auto& c : vec) get<1>(c) = n - get<1>(c) - 1;

    ans = min(ans, find());

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            ll snd = m - j - 1;
            if (j < snd) swap(grid[i][j], grid[i][snd]);
        }
    }
    for (auto& c : vec) get<2>(c) = m - get<2>(c) - 1;

    ans = min(ans, find());

    cout << ans;

    return 0;
}

Compilation message

joioi.cpp: In function 'll find()':
joioi.cpp:49:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::tuple<int, int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for (int i = 0; i < vec.size(); i++) {
      |                     ~~^~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 26 ms 1968 KB Output is correct
17 Correct 15 ms 1992 KB Output is correct
18 Correct 11 ms 1992 KB Output is correct
19 Correct 15 ms 1992 KB Output is correct
20 Correct 10 ms 1864 KB Output is correct
21 Correct 13 ms 1940 KB Output is correct
22 Correct 12 ms 1992 KB Output is correct
23 Correct 11 ms 1992 KB Output is correct
24 Correct 14 ms 1952 KB Output is correct
25 Correct 12 ms 1992 KB Output is correct
26 Correct 11 ms 1992 KB Output is correct
27 Correct 11 ms 1992 KB Output is correct
28 Correct 11 ms 1928 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 26 ms 1968 KB Output is correct
17 Correct 15 ms 1992 KB Output is correct
18 Correct 11 ms 1992 KB Output is correct
19 Correct 15 ms 1992 KB Output is correct
20 Correct 10 ms 1864 KB Output is correct
21 Correct 13 ms 1940 KB Output is correct
22 Correct 12 ms 1992 KB Output is correct
23 Correct 11 ms 1992 KB Output is correct
24 Correct 14 ms 1952 KB Output is correct
25 Correct 12 ms 1992 KB Output is correct
26 Correct 11 ms 1992 KB Output is correct
27 Correct 11 ms 1992 KB Output is correct
28 Correct 11 ms 1928 KB Output is correct
29 Execution timed out 4057 ms 65016 KB Time limit exceeded
30 Halted 0 ms 0 KB -