oj.uz

Submission #317067

# Submission time Handle Problem Language Result Execution time Memory
317067 2020-10-29T02:25:30 Z 8e7 Maxcomp (info1cup18_maxcomp) C++14
100 / 100
 140 ms 8312 KB 
#include <iostream>
#include <algorithm>
#include <utility>
#include <vector>
#define ll long long
#define pii pair<int, int>
#define maxn 1005
using namespace std;
int a[maxn][maxn], val[maxn][maxn];
int n, m;
inline int ab(int a) {
	return a > 0 ? a : -a;
}
const int NINF = -1000010000;
/*
struct BIT{
	int bit[maxn][maxn];
	void init(){
		for (int i = 0;i < maxn;i++) {
			for (int j = 0;j < maxn;j++) bit[i][j] = -NINF;
		}
	}
	void modify(int x, int y, int val) {
		for (;x < maxn;x += x & (-x)) {
			for(int c = y;c < maxn;c += c & (-c)) bit[x][c] = max(bit[x][c], val);
		}
	}
	int query(int x, int y) {
		int ret = NINF;
		for (;x > 0;x -= x & (-x)) {
			for (int c = y;c > 0;c -= c & (-c)) ret = max(ret, bit[x][c]);
		}
		return ret;
	}
} bit;
*/
int main() {
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin >> n >> m;
	for (int i = 0;i < n;i++) {
		for (int j = 0;j < m;j++) cin >> a[i][j];
	}
	int ans = NINF;
	for (int i = 0;i < n;i++) {
		for (int j = 0;j < m;j++) {
			val[i][j] = max(-a[i][j] + i + j, max(i ? val[i - 1][j] : NINF, j ? val[i][j - 1] : NINF));
			//cout << val[i][j] << " ";
			ans = max(ans, a[i][j] - i - j - 1 + val[i][j]);
		}
		//cout << endl;
	}
	//cout << ans << endl;
	for (int i = n - 1;i >= 0;i--) {
		for (int j = 0;j < m;j++) {
			val[i][j] = max(-a[i][j] - i + j, max(i < n - 1 ? val[i + 1][j] : NINF, j ? val[i][j - 1] : NINF));
			ans = max(ans, a[i][j] + i - j - 1 + val[i][j]);
		}
	}
	for (int i = 0;i < n;i++) {
		for (int j = m - 1;j >= 0;j--) {
			val[i][j] = max(-a[i][j] + i - j, max(i ? val[i - 1][j] : NINF, j < m - 1 ? val[i][j + 1] : NINF));
			ans = max(ans, a[i][j] - i + j - 1 + val[i][j]);
		}
	}
	for (int i = n - 1;i >= 0;i--) {
		for (int j = m - 1;j >= 0;j--) {
			val[i][j] = max(-a[i][j] - i - j, max(i < n - 1 ? val[i + 1][j] : NINF, j < m - 1 ? val[i][j + 1] : NINF));
			ans = max(ans, a[i][j] + i + j - 1 + val[i][j]);
		}
	}
	cout << ans << endl;
}
/*
1 5
2 4 5 6 3

2 3
2 4 3
5 7 5
 */

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 896 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 768 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 768 KB Output is correct
13 Correct 1 ms 896 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 1 ms 768 KB Output is correct
16 Correct 1 ms 768 KB Output is correct
17 Correct 1 ms 768 KB Output is correct
18 Correct 135 ms 8184 KB Output is correct
19 Correct 138 ms 8184 KB Output is correct
20 Correct 130 ms 8184 KB Output is correct
21 Correct 138 ms 8312 KB Output is correct
22 Correct 135 ms 8188 KB Output is correct
23 Correct 140 ms 8184 KB Output is correct
24 Correct 136 ms 7800 KB Output is correct