oj.uz

Submission #459628

# Submission time Handle Problem Language Result Execution time Memory
459628 2021-08-08T21:02:41 Z TeaTime The Kingdom of JOIOI (JOI17_joioi) C++17
60 / 100
 4000 ms 129392 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 long long ll;
typedef long double ld;

const ll SZ = 2050, INF = 1e9 * 1e9;
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<long long int, long long int, long long 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 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 26 ms 3140 KB Output is correct
17 Correct 15 ms 3268 KB Output is correct
18 Correct 11 ms 3232 KB Output is correct
19 Correct 15 ms 3268 KB Output is correct
20 Correct 13 ms 3168 KB Output is correct
21 Correct 16 ms 3308 KB Output is correct
22 Correct 12 ms 3296 KB Output is correct
23 Correct 12 ms 3268 KB Output is correct
24 Correct 14 ms 3184 KB Output is correct
25 Correct 18 ms 3340 KB Output is correct
26 Correct 12 ms 3264 KB Output is correct
27 Correct 22 ms 3216 KB Output is correct
28 Correct 12 ms 3244 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 26 ms 3140 KB Output is correct
17 Correct 15 ms 3268 KB Output is correct
18 Correct 11 ms 3232 KB Output is correct
19 Correct 15 ms 3268 KB Output is correct
20 Correct 13 ms 3168 KB Output is correct
21 Correct 16 ms 3308 KB Output is correct
22 Correct 12 ms 3296 KB Output is correct
23 Correct 12 ms 3268 KB Output is correct
24 Correct 14 ms 3184 KB Output is correct
25 Correct 18 ms 3340 KB Output is correct
26 Correct 12 ms 3264 KB Output is correct
27 Correct 22 ms 3216 KB Output is correct
28 Correct 12 ms 3244 KB Output is correct
29 Execution timed out 4048 ms 129392 KB Time limit exceeded
30 Halted 0 ms 0 KB -