oj.uz

Submission #1012748

# Submission time Handle Problem Language Result Execution time Memory
1012748 2024-07-02T14:36:16 Z NintsiChkhaidze The Kingdom of JOIOI (JOI17_joioi) C++17
60 / 100
 4000 ms 229700 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 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 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 348 KB Output is correct
9 Correct 0 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 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 348 KB Output is correct
9 Correct 0 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 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 10 ms 5304 KB Output is correct
17 Correct 20 ms 4484 KB Output is correct
18 Correct 16 ms 4188 KB Output is correct
19 Correct 14 ms 3968 KB Output is correct
20 Correct 18 ms 3972 KB Output is correct
21 Correct 30 ms 5388 KB Output is correct
22 Correct 23 ms 3420 KB Output is correct
23 Correct 18 ms 3932 KB Output is correct
24 Correct 16 ms 3636 KB Output is correct
25 Correct 18 ms 3160 KB Output is correct
26 Correct 30 ms 4444 KB Output is correct
27 Correct 30 ms 4956 KB Output is correct
28 Correct 33 ms 5464 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 348 KB Output is correct
9 Correct 0 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 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 10 ms 5304 KB Output is correct
17 Correct 20 ms 4484 KB Output is correct
18 Correct 16 ms 4188 KB Output is correct
19 Correct 14 ms 3968 KB Output is correct
20 Correct 18 ms 3972 KB Output is correct
21 Correct 30 ms 5388 KB Output is correct
22 Correct 23 ms 3420 KB Output is correct
23 Correct 18 ms 3932 KB Output is correct
24 Correct 16 ms 3636 KB Output is correct
25 Correct 18 ms 3160 KB Output is correct
26 Correct 30 ms 4444 KB Output is correct
27 Correct 30 ms 4956 KB Output is correct
28 Correct 33 ms 5464 KB Output is correct
29 Correct 2057 ms 184720 KB Output is correct
30 Correct 2033 ms 186372 KB Output is correct
31 Correct 1740 ms 144488 KB Output is correct
32 Correct 2402 ms 229700 KB Output is correct
33 Correct 1191 ms 107528 KB Output is correct
34 Correct 2134 ms 206416 KB Output is correct
35 Execution timed out 4075 ms 225204 KB Time limit exceeded
36 Halted 0 ms 0 KB -