oj.uz

Submission #1012754

# Submission time Handle Problem Language Result Execution time Memory
1012754 2024-07-02T14:41:10 Z NintsiChkhaidze The Kingdom of JOIOI (JOI17_joioi) C++17
100 / 100
 3785 ms 234064 KB 
#include <bits/stdc++.h>
#define pb push_back
#define s second
#define f first
#define pb push_back
#define pii pair <int,int>
#define ll long long
#pragma GCC optimize("Ofast")
using namespace std;

const int N = 2e3 + 3;
int a[N][N],n,m,mn,mx,cnt[3][N];
bool vis[N][N],cur[3][N][N];

void go(int x,int y,int d){
	if (x < 1 || y < 1 || x > n || y > m || vis[x][y]) return;
	if (a[x][y] - mn > d) return;
	vis[x][y] = 1;
	go(x+1,y,d);
	go(x-1,y,d);
	go(x,y+1,d);
	go(x,y-1,d);
}

bool get(bool k,int d){
	int mn1=-1,mx1=-1,mn2=-1,mx2=-1;
	for (int i= 1; i <= n; i++){
		for (int j= 1;j<=m;j++){
			if(cur[k][i][j]){
				if (mn1 == -1) {
					mn1 = mx1 = a[i][j];
				}else{
					mn1 = min(mn1,a[i][j]);
					mx1 = max(mx1,a[i][j]);
				}
			}else{	
				if (mn2 == -1) {
					mn2 = mx2 = a[i][j];
				}else{
					mn2 = min(mn2,a[i][j]);
					mx2 = max(mx2,a[i][j]);
				}
			}

			if (mx2-mn2 > d) return 0;
			if (mx1-mn1 > d) return 0;
		}
	}

	return 1;
}

bool go1(int d){
	int mn0 = 2e9,mn1 = 2e9,l0,r0,l1,r1;
	for (int i = 1; i <= n; i++){
		mn0 = min(mn0,cnt[0][i]);
		mn1 = min(mn1,cnt[1][i]);
		l0 = m - mn0 + 1; r0 = m;
		l1 = 1; r1 = mn1;
		
		for (int j = 1; j <= m; j++){
			cur[1][i][j] = (j >= l1 && j <= r1);
			cur[0][i][j] = (j >= l0 && j <= r0);
		}
	}
	
	return (get(0,d)) || (get(1,d));
}

bool go2(int d){
	int mn0 = 2e9,mn1 = 2e9,l0,r0,l1,r1;
	for (int i = n; i >= 1; i--){
		mn0 = min(mn0,cnt[0][i]);
		mn1 = min(mn1,cnt[1][i]);
		l0 = m - mn0 + 1; r0 = m;
		l1 = 1; r1 = mn1;

		for (int j = 1; j <= m; j++){
			cur[1][i][j] = (j >= l1 && j <= r1);
			cur[0][i][j] = (j >= l0 && j <= r0);
		}
	}
	
	return (get(0,d)) || (get(1,d));
}

signed main() {
	ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);

	cin>>n>>m;

	mn = 2e9;
	int X = 0,Y=0;
	for (int i = 1; i <= n; i++){
		for (int j = 1; j <= m; j++){
			cin >> a[i][j];
			if (a[i][j] < mn){
				X=i,Y=j;
				mn=a[i][j];
			}
			mx=max(mx,a[i][j]);
		}
	}

	int l = 0,r = mx - mn,ans=mx-mn;
	while (l <= r){
		int mid=(l+r)/2;
		go(X,Y,mid);

		for (int i = 1; i <= n; i++){
			cnt[0][i] = m;
			for (int j = m; j >= 1; j--){
				if (!vis[i][j]){
					cnt[0][i] = m - j;
					break;
				}
			}

			cnt[1][i] = m;
			for (int j = 1; j <= m; j++){
				if (!vis[i][j]){
					cnt[1][i] = j - 1;
					break;
				}
			}

			for (int j = 1; j <= m; j++)
				vis[i][j] = 0;
		}

		if (go1(mid) || go2(mid)){
			ans = mid;
			r = mid-1;
		}else{
			l = mid + 1;
		}
	}
	
	cout<<ans<<endl;
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4492 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 4444 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 2392 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4492 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 4444 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 2392 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 2648 KB Output is correct
16 Correct 6 ms 8536 KB Output is correct
17 Correct 19 ms 6096 KB Output is correct
18 Correct 12 ms 7256 KB Output is correct
19 Correct 12 ms 5464 KB Output is correct
20 Correct 17 ms 7004 KB Output is correct
21 Correct 29 ms 6748 KB Output is correct
22 Correct 17 ms 4956 KB Output is correct
23 Correct 16 ms 5464 KB Output is correct
24 Correct 16 ms 5212 KB Output is correct
25 Correct 17 ms 4884 KB Output is correct
26 Correct 27 ms 7508 KB Output is correct
27 Correct 30 ms 6492 KB Output is correct
28 Correct 31 ms 7096 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4492 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 0 ms 2396 KB Output is correct
6 Correct 0 ms 4444 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2392 KB Output is correct
10 Correct 1 ms 2392 KB Output is correct
11 Correct 0 ms 2396 KB Output is correct
12 Correct 1 ms 2392 KB Output is correct
13 Correct 0 ms 2396 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 2648 KB Output is correct
16 Correct 6 ms 8536 KB Output is correct
17 Correct 19 ms 6096 KB Output is correct
18 Correct 12 ms 7256 KB Output is correct
19 Correct 12 ms 5464 KB Output is correct
20 Correct 17 ms 7004 KB Output is correct
21 Correct 29 ms 6748 KB Output is correct
22 Correct 17 ms 4956 KB Output is correct
23 Correct 16 ms 5464 KB Output is correct
24 Correct 16 ms 5212 KB Output is correct
25 Correct 17 ms 4884 KB Output is correct
26 Correct 27 ms 7508 KB Output is correct
27 Correct 30 ms 6492 KB Output is correct
28 Correct 31 ms 7096 KB Output is correct
29 Correct 1887 ms 184780 KB Output is correct
30 Correct 1758 ms 186200 KB Output is correct
31 Correct 1356 ms 144464 KB Output is correct
32 Correct 2044 ms 229728 KB Output is correct
33 Correct 1051 ms 108120 KB Output is correct
34 Correct 1956 ms 206488 KB Output is correct
35 Correct 3785 ms 225440 KB Output is correct
36 Correct 2303 ms 173636 KB Output is correct
37 Correct 3412 ms 234064 KB Output is correct