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Submission #197275

# Submission time Handle Problem Language Result Execution time Memory
197275 2020-01-19T21:01:30 Z Bagritsevich_Stepan Maxcomp (info1cup18_maxcomp) C++14
100 / 100
 161 ms 20708 KB 
//#include "/Users/stdc++.h"
#include <bits/stdc++.h>
 
using namespace std;

#define mp make_pair
#define pb push_back
#define fast_io ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define pii pair < int, int >
#define fs first
#define sc second
#define getfiles ifstream cin("input.txt"); ofstream cout("output.txt");
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()

typedef long long ll;
typedef long double ld;

const int INF = 2e9;
const ll BIG_INF = 1e18;
const ll MOD = 1e9 + 7;

const int maxn = 1e3 + 5;
int mat[maxn][maxn], pref[maxn][maxn];
int a[maxn][maxn], n, m, ans;

void rev(int i_k, int j_k) {
    if (i_k == -1 && j_k == -1)
        return;
    
    if (!(i_k == -1 && j_k == 1)) {
        for (int i = 0; i < n / 2; i++)
            for (int j = 0; j < m; j++)
                swap(mat[i][j], mat[n - i - 1][j]);
    }
    
    if (i_k == 1 && j_k == -1)
        return;
    
    for (int i = 0; i < n; i++)
        for (int j = 0; j < m / 2; j++)
            swap(mat[i][j], mat[i][m - j - 1]);
}

void upd(int i_k, int j_k) {
    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            mat[i][j] = a[i][j] + i_k * i + j_k * j;
    
    rev(i_k, j_k);
    
    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            pref[i + 1][j + 1] = min(min(pref[i + 1][j], pref[i][j + 1]), mat[i][j]);
}

void upd_ans() {
    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            ans = max(ans, mat[i][j] - pref[i + 1][j + 1] - 1);
}

int main() {
    fast_io
    cin >> n >> m;
    
    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            cin >> a[i][j];
    
    for (int i = 0; i <= n; i++)
        for (int j = 0; j <= m; j++)
            pref[i][j] = INF;
    
    ans = -1;
    
    upd(1, 1);
    upd_ans();
    
    upd(1, -1);
    upd_ans();
    
    upd(-1, 1);
    upd_ans();
    
    upd(-1, -1);
    upd_ans();
    
    cout << ans << "\n";
    return 0;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 348 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 1016 KB Output is correct
10 Correct 3 ms 1016 KB Output is correct
11 Correct 3 ms 888 KB Output is correct
12 Correct 3 ms 888 KB Output is correct
13 Correct 3 ms 1016 KB Output is correct
14 Correct 3 ms 888 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 3 ms 1016 KB Output is correct
13 Correct 3 ms 1016 KB Output is correct
14 Correct 3 ms 888 KB Output is correct
15 Correct 3 ms 888 KB Output is correct
16 Correct 3 ms 1016 KB Output is correct
17 Correct 3 ms 888 KB Output is correct
18 Correct 160 ms 13560 KB Output is correct
19 Correct 160 ms 15224 KB Output is correct
20 Correct 152 ms 20376 KB Output is correct
21 Correct 160 ms 13580 KB Output is correct
22 Correct 161 ms 20708 KB Output is correct
23 Correct 161 ms 20680 KB Output is correct
24 Correct 155 ms 12972 KB Output is correct