oj.uz

Submission #1012746

# Submission time Handle Problem Language Result Execution time Memory
1012746 2024-07-02T14:35:43 Z NintsiChkhaidze The Kingdom of JOIOI (JOI17_joioi) C++17
60 / 100
 4000 ms 229744 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);
}

int get(bool k){
	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]);
				}
			}
		}
	}

	return max(mx2-mn2,mx1-mn1);
}

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 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 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 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 7 ms 5468 KB Output is correct
17 Correct 23 ms 4444 KB Output is correct
18 Correct 19 ms 4112 KB Output is correct
19 Correct 17 ms 3928 KB Output is correct
20 Correct 20 ms 3928 KB Output is correct
21 Correct 32 ms 5208 KB Output is correct
22 Correct 23 ms 3420 KB Output is correct
23 Correct 21 ms 3944 KB Output is correct
24 Correct 24 ms 3676 KB Output is correct
25 Correct 21 ms 3164 KB Output is correct
26 Correct 42 ms 4196 KB Output is correct
27 Correct 34 ms 4952 KB Output is correct
28 Correct 35 ms 5468 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 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 7 ms 5468 KB Output is correct
17 Correct 23 ms 4444 KB Output is correct
18 Correct 19 ms 4112 KB Output is correct
19 Correct 17 ms 3928 KB Output is correct
20 Correct 20 ms 3928 KB Output is correct
21 Correct 32 ms 5208 KB Output is correct
22 Correct 23 ms 3420 KB Output is correct
23 Correct 21 ms 3944 KB Output is correct
24 Correct 24 ms 3676 KB Output is correct
25 Correct 21 ms 3164 KB Output is correct
26 Correct 42 ms 4196 KB Output is correct
27 Correct 34 ms 4952 KB Output is correct
28 Correct 35 ms 5468 KB Output is correct
29 Correct 2040 ms 184544 KB Output is correct
30 Correct 2211 ms 186372 KB Output is correct
31 Correct 1932 ms 144344 KB Output is correct
32 Correct 2558 ms 229744 KB Output is correct
33 Correct 1343 ms 107540 KB Output is correct
34 Correct 2338 ms 206328 KB Output is correct
35 Execution timed out 4043 ms 225420 KB Time limit exceeded
36 Halted 0 ms 0 KB -