oj.uz

Submission #197087

# Submission time Handle Problem Language Result Execution time Memory
197087 2020-01-18T14:39:13 Z Pankin Maxcomp (info1cup18_maxcomp) C++14
100 / 100
 175 ms 4480 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("-O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#define mp make_pair
#define ll long long
#define ld long double
#define pb push_back
#define fast_io ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define fs first
#define sc second
#define getfiles ifstream cin("input.txt"); ofstream cout("output.txt");
#define endl '\n'
#define pii pair<int, int>

const int INF = 2000000005;
const ll BIG_INF = 2000000000000000005;
const int mod = 1000000007;
const int P = 31;
const ld PI = 3.141592653589793238462643;
const double eps = 1e-9;

using namespace std;
using namespace __gnu_pbds;

bool valid(int x, int y, int n, int m) {
    return x >= 0 && y >= 0 && x < n && y < m;
}

mt19937 rng(1999999973);

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

const int N = 1005;
int a[N][N], n, m, curVal[N], suf[N], pref[N], ans = 0;

inline void update(int x) {
    for (int i = 0; i < m; i++) {
        curVal[i] = min(curVal[i], a[x][i] - x);
    }
    int curMin = INF;
    for (int i = 0; i < m; i++) {
        curMin = min(curMin, curVal[i] - i);
        pref[i] = curMin;
    }
    curMin = INF;
    for (int i = m - 1; i >= 0; i--) {
        curMin = min(curMin, curVal[i] + i);
        suf[i] = curMin;
    }
}

inline void repeat() {
    for (int i = 0; i < N; i++) {
        curVal[i] = INF;
    }
    for (int x = 0; x < n; x++) {
        update(x);

        for (int y = 0; y < m; y++) {
            ans = max(ans, a[x][y] - pref[y] - y - x);
            ans = max(ans, a[x][y] - suf[y] + y - x);
        }
    }
}

signed main() {
    fast_io;

    //getfiles;

    cin >> n >> m;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            cin >> a[i][j];
        }
    }

    repeat();

    for (int i = 0; i < n; i++) {
        reverse(a[i], a[i] + m);
    }
    for (int i = 0; i < n - 1 - i; i++) {
        for (int j = 0; j < m; j++) {
            swap(a[i][j], a[n - 1 - i][j]);
        }
    }

    repeat();

    cout << ans - 1;

    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 7 ms 380 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 380 KB Output is correct
3 Correct 2 ms 248 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 7 ms 380 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 4 ms 504 KB Output is correct
11 Correct 3 ms 632 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 3 ms 504 KB Output is correct
14 Correct 2 ms 632 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 7 ms 380 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 380 KB Output is correct
11 Correct 2 ms 248 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 4 ms 504 KB Output is correct
14 Correct 3 ms 632 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 3 ms 504 KB Output is correct
17 Correct 2 ms 632 KB Output is correct
18 Correct 148 ms 4288 KB Output is correct
19 Correct 150 ms 4460 KB Output is correct
20 Correct 143 ms 4344 KB Output is correct
21 Correct 175 ms 4480 KB Output is correct
22 Correct 148 ms 4216 KB Output is correct
23 Correct 146 ms 4316 KB Output is correct
24 Correct 138 ms 4224 KB Output is correct