oj.uz

Submission #1051644

# Submission time Handle Problem Language Result Execution time Memory
1051644 2024-08-10T08:48:28 Z SamAnd The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 847 ms 54868 KB 
#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const int N = 2003;
const int INF = 1000000009;

int n, m;
int a[N][N];

bool stg(int x, int y, int z)
{
    int maxu = 0;
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= m; ++j)
            maxu = max(maxu, a[i][j]);
    }
    if (maxu - a[x][y] <= z)
        return true;

    int min1 = a[x][y];
    int max1 = 0;
    int min2 = INF;
    int max2 = 0;
    int l = y;
    int r = m;
    for (int i = 1; i <= n; ++i)
    {
        if (l > r)
            return false;
        for (int j = 1; j <= l; ++j)
        {
            max1 = max(max1, a[i][j]);
        }
        for (int j = l + 1; j <= r; ++j)
        {
            if (a[i][j] - min1 > z)
            {
                r = j - 1;
                break;
            }
            max1 = max(max1, a[i][j]);
        }
        for (int j = r + 1; j <= m; ++j)
        {
            min2 = min(min2, a[i][j]);
            max2 = max(max2, a[i][j]);
        }
        if (i == x)
        {
            l = 0;
        }
    }

    return (max1 - min1 <= z && max2 - min2 <= z);
}

int solvv()
{
    int mini = 1;
    int minj = 1;
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= m; ++j)
        {
            if (a[i][j] < a[mini][minj])
            {
                mini = i;
                minj = j;
            }
        }
    }

    if (mini == n && minj == m)
        return INF;

    int l = 0, r = INF;
    int ans;
    while (l <= r)
    {
        int m = (l + r) / 2;
        if (stg(mini, minj, m))
        {
            ans = m;
            r = m - 1;
        }
        else
            l = m + 1;
    }

    return ans;
}

void frt()
{
    for (int i = 1; i <= n; ++i)
    {
        reverse(a[i] + 1, a[i] + m + 1);
    }
}
void frs()
{
    for (int j = 1; j <= m; ++j)
    {
        vector<int> v;
        for (int i = 1; i <= n; ++i)
            v.push_back(a[i][j]);
        reverse(all(v));
        for (int i = 1; i <= n; ++i)
            a[i][j] = v[i - 1];
    }
}

void solv()
{
    cin >> n >> m;
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= m; ++j)
            cin >> a[i][j];
    }

    int ans = solvv();
    frt();
    ans = min(ans, solvv());
    frs();
    ans = min(ans, solvv());
    frt();
    ans = min(ans, solvv());

    cout << ans << "\n";
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    ios_base::sync_with_stdio(false), cin.tie(0);

    int tt = 1;
    //cin >> tt;
    while (tt--)
    {
        solv();
    }
    return 0;
}

Compilation message

joioi.cpp: In function 'int solvv()':
joioi.cpp:85:9: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   85 |     int ans;
      |         ^~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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 476 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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 476 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 5 ms 2536 KB Output is correct
17 Correct 7 ms 2908 KB Output is correct
18 Correct 6 ms 2908 KB Output is correct
19 Correct 7 ms 2908 KB Output is correct
20 Correct 6 ms 2652 KB Output is correct
21 Correct 8 ms 2908 KB Output is correct
22 Correct 9 ms 2792 KB Output is correct
23 Correct 9 ms 2908 KB Output is correct
24 Correct 7 ms 2908 KB Output is correct
25 Correct 8 ms 3000 KB Output is correct
26 Correct 8 ms 2908 KB Output is correct
27 Correct 11 ms 3020 KB Output is correct
28 Correct 8 ms 2996 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 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 476 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 5 ms 2536 KB Output is correct
17 Correct 7 ms 2908 KB Output is correct
18 Correct 6 ms 2908 KB Output is correct
19 Correct 7 ms 2908 KB Output is correct
20 Correct 6 ms 2652 KB Output is correct
21 Correct 8 ms 2908 KB Output is correct
22 Correct 9 ms 2792 KB Output is correct
23 Correct 9 ms 2908 KB Output is correct
24 Correct 7 ms 2908 KB Output is correct
25 Correct 8 ms 3000 KB Output is correct
26 Correct 8 ms 2908 KB Output is correct
27 Correct 11 ms 3020 KB Output is correct
28 Correct 8 ms 2996 KB Output is correct
29 Correct 580 ms 37240 KB Output is correct
30 Correct 533 ms 37612 KB Output is correct
31 Correct 593 ms 39248 KB Output is correct
32 Correct 572 ms 39040 KB Output is correct
33 Correct 508 ms 34864 KB Output is correct
34 Correct 573 ms 39504 KB Output is correct
35 Correct 847 ms 54792 KB Output is correct
36 Correct 746 ms 49912 KB Output is correct
37 Correct 806 ms 54868 KB Output is correct