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Submission #44828

# Submission time Handle Problem Language Result Execution time Memory
44828 2018-04-07T10:47:11 Z aome Maxcomp (info1cup18_maxcomp) C++17
100 / 100
 231 ms 24428 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 1005;
const long long INF = 1e18;

int n, m;
long long a[N][N];
long long f1[N][N], f2[N][N];
long long res;

void reset() {
	for (int i = 0; i <= n + 1; ++i) {
		for (int j = 0; j <= m + 1; ++j) {
			f1[i][j] = f2[i][j] = -INF;
		}
	}
}

int main() {
	ios::sync_with_stdio(false);
	cin >> n >> m;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			cin >> a[i][j];
		}
	}
	res = -INF;
	reset();
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= m; ++j) {
			f1[i][j] = max(max(f1[i - 1][j], f1[i][j - 1]), -a[i][j] + i + j);
			f2[i][j] = max(max(f2[i - 1][j], f2[i][j - 1]), +a[i][j] + i + j);
			res = max(res, f1[i][j] + a[i][j] - i - j);
			res = max(res, f2[i][j] - a[i][j] - i - j);
		}
	}
	reset();
	for (int i = 1; i <= n; ++i) {
		for (int j = m; j >= 1; --j) {
			f1[i][j] = max(max(f1[i - 1][j], f1[i][j + 1]), -a[i][j] + i - j);
			f2[i][j] = max(max(f2[i - 1][j], f2[i][j + 1]), +a[i][j] + i - j);
			res = max(res, f1[i][j] + a[i][j] - i + j);
			res = max(res, f2[i][j] - a[i][j] - i + j);
		}
	}
	reset();
	for (int i = n; i >= 1; --i) {
		for (int j = 1; j <= m; ++j) {
			f1[i][j] = max(max(f1[i + 1][j], f1[i][j - 1]), -a[i][j] - i + j);
			f2[i][j] = max(max(f2[i + 1][j], f2[i][j - 1]), +a[i][j] - i + j);
			res = max(res, f1[i][j] + a[i][j] + i - j);
			res = max(res, f2[i][j] - a[i][j] + i - j);
		}
	}
	reset();
	for (int i = n; i >= 1; --i) {
		for (int j = m; j >= 1; --j) {
			f1[i][j] = max(max(f1[i + 1][j], f1[i][j + 1]), -a[i][j] - i - j);
			f2[i][j] = max(max(f2[i + 1][j], f2[i][j + 1]), +a[i][j] - i - j);
			res = max(res, f1[i][j] + a[i][j] + i + j);
			res = max(res, f2[i][j] - a[i][j] + i + j);
		}
	}
	cout << res - 1;
}

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 488 KB Output is correct
3 Correct 2 ms 672 KB Output is correct
4 Correct 2 ms 672 KB Output is correct
5 Correct 2 ms 672 KB Output is correct
6 Correct 2 ms 700 KB Output is correct
7 Correct 2 ms 700 KB Output is correct
8 Correct 2 ms 700 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 700 KB Output is correct
2 Correct 2 ms 700 KB Output is correct
3 Correct 2 ms 700 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 488 KB Output is correct
3 Correct 2 ms 672 KB Output is correct
4 Correct 2 ms 672 KB Output is correct
5 Correct 2 ms 672 KB Output is correct
6 Correct 2 ms 700 KB Output is correct
7 Correct 2 ms 700 KB Output is correct
8 Correct 2 ms 700 KB Output is correct
9 Correct 3 ms 1276 KB Output is correct
10 Correct 4 ms 1276 KB Output is correct
11 Correct 3 ms 1276 KB Output is correct
12 Correct 4 ms 1276 KB Output is correct
13 Correct 3 ms 1276 KB Output is correct
14 Correct 3 ms 1276 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 488 KB Output is correct
3 Correct 2 ms 672 KB Output is correct
4 Correct 2 ms 672 KB Output is correct
5 Correct 2 ms 672 KB Output is correct
6 Correct 2 ms 700 KB Output is correct
7 Correct 2 ms 700 KB Output is correct
8 Correct 2 ms 700 KB Output is correct
9 Correct 2 ms 700 KB Output is correct
10 Correct 2 ms 700 KB Output is correct
11 Correct 2 ms 700 KB Output is correct
12 Correct 3 ms 1276 KB Output is correct
13 Correct 4 ms 1276 KB Output is correct
14 Correct 3 ms 1276 KB Output is correct
15 Correct 4 ms 1276 KB Output is correct
16 Correct 3 ms 1276 KB Output is correct
17 Correct 3 ms 1276 KB Output is correct
18 Correct 195 ms 24428 KB Output is correct
19 Correct 201 ms 24428 KB Output is correct
20 Correct 171 ms 24428 KB Output is correct
21 Correct 231 ms 24428 KB Output is correct
22 Correct 188 ms 24428 KB Output is correct
23 Correct 185 ms 24428 KB Output is correct
24 Correct 213 ms 24428 KB Output is correct