oj.uz

Submission #1012751

# Submission time Handle Problem Language Result Execution time Memory
1012751 2024-07-02T14:38:23 Z NintsiChkhaidze The Kingdom of JOIOI (JOI17_joioi) C++17
60 / 100
 4000 ms 254972 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
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 clear(){
	for (int i=1;i<=n;i++)
		for(int j = 1; j <= m;j++)
			vis[i][j]=0;
}

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 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 432 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 468 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 432 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 5 ms 5468 KB Output is correct
17 Correct 28 ms 4832 KB Output is correct
18 Correct 13 ms 4284 KB Output is correct
19 Correct 12 ms 4188 KB Output is correct
20 Correct 16 ms 4184 KB Output is correct
21 Correct 38 ms 7260 KB Output is correct
22 Correct 18 ms 5468 KB Output is correct
23 Correct 21 ms 4184 KB Output is correct
24 Correct 16 ms 3932 KB Output is correct
25 Correct 17 ms 3676 KB Output is correct
26 Correct 29 ms 4656 KB Output is correct
27 Correct 28 ms 5212 KB Output is correct
28 Correct 32 ms 5872 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 432 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 5 ms 5468 KB Output is correct
17 Correct 28 ms 4832 KB Output is correct
18 Correct 13 ms 4284 KB Output is correct
19 Correct 12 ms 4188 KB Output is correct
20 Correct 16 ms 4184 KB Output is correct
21 Correct 38 ms 7260 KB Output is correct
22 Correct 18 ms 5468 KB Output is correct
23 Correct 21 ms 4184 KB Output is correct
24 Correct 16 ms 3932 KB Output is correct
25 Correct 17 ms 3676 KB Output is correct
26 Correct 29 ms 4656 KB Output is correct
27 Correct 28 ms 5212 KB Output is correct
28 Correct 32 ms 5872 KB Output is correct
29 Correct 2055 ms 201844 KB Output is correct
30 Correct 1915 ms 203024 KB Output is correct
31 Correct 1519 ms 162664 KB Output is correct
32 Correct 2236 ms 247904 KB Output is correct
33 Correct 1130 ms 123652 KB Output is correct
34 Correct 2120 ms 224656 KB Output is correct
35 Execution timed out 4030 ms 254972 KB Time limit exceeded
36 Halted 0 ms 0 KB -