oj.uz

Submission #317113

# Submission time Handle Problem Language Result Execution time Memory
317113 2020-10-29T03:35:22 Z Seanliu Maxcomp (info1cup18_maxcomp) C++14
100 / 100
 171 ms 21240 KB 
#include <iostream>
#define int long long int
#define ericxiao ios_base::sync_with_stdio(0);cin.tie(0);
using namespace std;
 
const int maxN = 1e3 + 326, INF = 2e15;
 
int N, M, arr[maxN][maxN], dp[maxN], nxt[maxN], mx[maxN], nxtmx[maxN], r = -1, narr[maxN][maxN]; 
 
int solve(){
	for(int i = 0; i < M; i++) dp[i] = nxt[i] = mx[i] = nxtmx[i] = -INF;
	int ans = -INF;
	for(int i = 0; i < M; i++){
		dp[i] = -arr[0][i] + i - 1;
		mx[i] = dp[i];
		if(i){
			mx[i] = max(mx[i], mx[i - 1]);
			ans = max(ans, arr[0][i] - i + mx[i - 1]);
		}
	}
	for(int i = 1; i < N; i++){
		for(int j = 0; j < M; j++){
			dp[j] = -arr[i][j] + i + j - 1;	
			nxtmx[j] = max(mx[j], dp[j]);
			ans = max(ans, arr[i][j] - i - j + mx[j]);
			if(j){
				nxtmx[j] = max(nxtmx[j], nxtmx[j - 1]);
				ans = max(ans, arr[i][j] - i - j + nxtmx[j - 1]);
			}
			//cout << "Pre for " << i << ", " << j << " = " << nxtmx[j] << endl;
		}
		for(int j = 0; j < M; j++) mx[j] = nxtmx[j];
	}
	return ans;
}
 
void rot(){
	for(int i = 0; i < N; i++){
		for(int j = 0; j < M; j++){
			narr[j][N - i - 1] = arr[i][j];	
			//cout << "narr[" << j << "][" << N - i - 1 << "] = " << arr[i][j] << endl;
		}
	}
	swap(N, M);
	for(int i = 0; i < N; i++) for(int j = 0; j < M; j++) arr[i][j] = narr[i][j];
}
 
signed main(){
	ericxiao
	cin >> N >> M;
	for(int i = 0; i < N; i++) for(int j = 0; j < M; j++) cin >> arr[i][j];
	for(int i = 0; i < 5; i++){
		r = max(r, solve());
		/*
		for(int j = 0; j < N; j++){
			for(int k = 0; k < M; k++){
				cout << arr[j][k] << " ";
			}
			cout << endl;
		}
		*/
		rot();
	}
	cout << r << endl;
}

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 512 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 5 ms 8448 KB Output is correct
2 Correct 5 ms 8448 KB Output is correct
3 Correct 5 ms 8448 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 512 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 768 KB Output is correct
11 Correct 1 ms 768 KB Output is correct
12 Correct 2 ms 800 KB Output is correct
13 Correct 1 ms 768 KB Output is correct
14 Correct 1 ms 800 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 512 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 5 ms 8448 KB Output is correct
10 Correct 5 ms 8448 KB Output is correct
11 Correct 5 ms 8448 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
15 Correct 2 ms 800 KB Output is correct
16 Correct 1 ms 768 KB Output is correct
17 Correct 1 ms 800 KB Output is correct
18 Correct 171 ms 21116 KB Output is correct
19 Correct 162 ms 21112 KB Output is correct
20 Correct 153 ms 21112 KB Output is correct
21 Correct 160 ms 21088 KB Output is correct
22 Correct 159 ms 21112 KB Output is correct
23 Correct 159 ms 21112 KB Output is correct
24 Correct 157 ms 21240 KB Output is correct