oj.uz

Submission #46789

# Submission time Handle Problem Language Result Execution time Memory
46789 2018-04-23T09:43:16 Z jun6873 Maxcomp (info1cup18_maxcomp) C++11
15 / 100
 2 ms 484 KB 
#include <bits/stdc++.h>
using namespace std;

int h, w, a[1004][1004], mx[1004][1004];

int solve() {
	for (int i=0; i<=h; i++) for (int j=0; j<=w; j++) mx[i][j] = -2e9;
	int ret = 0;
	for (int i=1; i<=h; i++) for (int j=1; j<=w; j++) {
		int k = i + j - a[i][j];
		mx[i][j] = max({mx[i-1][j], mx[i][j-1], k});
		ret = max(ret, mx[i][j] - k - 1);
	}
	return ret;
}

int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0);

	cin >> h >> w;
	for (int i=1; i<=h; i++) for (int j=1; j<=w; j++)
		cin >> a[i][j];

	int ans = solve();
	for (int i=1; i<=h; i++) for (int j=1; j<=w/2; j++) swap(a[i][j], a[i][w-j+1]);
	ans = max(ans, solve());
	for (int i=1; i<=h/2; i++) for (int j=1; j<=w; j++) swap(a[i][j], a[h-i+1][j]);
	ans = max(ans, solve());
	for (int i=1; i<=h; i++) for (int j=1; j<=w/2; j++) swap(a[i][j], a[i][w-j+1]);
	ans = max(ans, solve());

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

Subtask #1
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 Incorrect 2 ms 432 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 448 KB Output is correct
2 Correct 2 ms 484 KB Output is correct
3 Correct 2 ms 484 KB Output is correct

Subtask #3
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 Incorrect 2 ms 432 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
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 Incorrect 2 ms 432 KB Output isn't correct
4 Halted 0 ms 0 KB -