Submission #923264

#	Time	Username	Problem	Language	Result	Execution time	Memory
923264		vjudge1	Maxcomp (info1cup18_maxcomp)	C++17	15 / 100	1 ms	2396 KiB

maxcomp

#include <bits/stdc++.h>
#define ll long long
#define s second
#define f first
#define pb push_back
#define pii pair <int,int>
#define left (h<<1),l,(l + r)/2
#define right ((h<<1)|1),(l + r)/2 + 1,r
#define int ll 
using namespace std;
 
const int N = 1e3 + 3,inf = 1e18;
 
int a[N][N],n,m,dp[N][N];
 
void go(){
	for (int i = 0; i <= n + 1; i++)
		for (int j = 0; j <= m + 1; j++){
			if (!i || i > n || !j || j > m) a[i][j] = inf;
			dp[i][j] = inf; 
		}	
}
signed main() {
	ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
 
	int ans=0;
	cin>>n>>m;
	for (int i = 1; i <= n; i++){
		for (int j = 1; j <= m; j++){
			cin >> a[i][j];
		}
	}
 
	go();
	for (int i = 1; i <= n; i++){
		for (int j = m; j >= 1; j--){
			dp[i][j] = min({dp[i][j],a[i - 1][j] + 2,a[i][j + 1] + 2});
			dp[i][j] = min({dp[i][j],dp[i - 1][j] + 1,dp[i][j + 1] + 1});
			ans=max(ans,a[i][j] - dp[i][j]);
		}
	}
 
	go();
	for (int i = 1; i <= n; i++){
		for (int j = 1; j <= m; j++){
			dp[i][j] = min({dp[i][j],a[i - 1][j] + 2,a[i][j - 1] + 2});
			dp[i][j] = min({dp[i][j],dp[i - 1][j] + 1,dp[i][j - 1] + 1});
			ans=max(ans,a[i][j] - dp[i][j]);
		}
	}
 
	go();
	for (int i = n; i >= 1; i--){
		for (int j = 1; j <= m; j++){
			dp[i][j] = min({dp[i][j],a[i + 1][j] + 2,a[i][j - 1] + 2});
			dp[i][j] = min({dp[i][j],dp[i + 1][j] + 1,dp[i][j - 1] + 1});
			ans=max(ans,a[i][j] - dp[i][j]);
		}
	}
 
	go();
	for (int i = n; i >= 1; i--){
		for (int j = m; j >= 1; j--){
			dp[i][j] = min({dp[i][j],a[i + 1][j] + 2,a[i][j + 1] + 2});
			dp[i][j] = min({dp[i][j],dp[i + 1][j] + 1,dp[i][j + 1] + 1});
			ans=max(ans,a[i][j] - dp[i][j]);
		}
	}
 
	cout<<ans;
}

• Subtask 1: 0 / 15
• Subtask 2: 15 / 15
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40