oj.uz

Submission #1012725

# Submission time Handle Problem Language Result Execution time Memory
1012725 2024-07-02T14:22:32 Z NintsiChkhaidze The Kingdom of JOIOI (JOI17_joioi) C++17
60 / 100
 4000 ms 260092 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
// #define int ll
using namespace std;

const int N = 2e3 + 3;
int a[N][N],n,m,mn,mx,cnt[N];
bool vis[N][N],cur[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(){
	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[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,bool dir){
	for (int i = 1; i <= n; i++)
		for (int j = 1; j <= m; j++)
			cur[i][j] = 0;

	int mnn = 2e9;
	for (int i = 1; i <= n; i++){
		mnn = min(mnn,cnt[i]);
		if (!dir){
			for (int j = m; j >= m - mnn + 1; j--){
				cur[i][j] = 1;
			}
		}else{
			for (int j = 1; j <= mnn; j++){
				cur[i][j] = 1;
			}
		}
	}
	
	return (get() <= d);
}

bool go2(int d,bool dir){
	for (int i = 1; i <= n; i++)
		for (int j = 1; j <= m; j++)
			cur[i][j] = 0;

	int mnn = 2e9;
	for (int i = n; i >= 1; i--){
		mnn = min(mnn,cnt[i]);
		if (!dir){
			for (int j = m; j >= m - mnn + 1; j--){
				cur[i][j] = 1;
			}
		}else{
			for (int j = 1; j <= mnn; j++){
				cur[i][j] = 1;
			}
		}
	}
	
	return (get() <= 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){
		clear();
		int mid=(l+r)/2;
		go(X,Y,mid);

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

		if (go1(mid,0) || go2(mid,0)){
			ans=mid;
			r=mid-1;
			continue;
		}

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

		if (go1(mid,1) || go2(mid,1)){
			ans=mid;
			r=mid-1;
			continue;
		}

		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 0 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 0 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 0 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 0 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 0 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 0 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 6 ms 5056 KB Output is correct
17 Correct 24 ms 4160 KB Output is correct
18 Correct 13 ms 3676 KB Output is correct
19 Correct 12 ms 3580 KB Output is correct
20 Correct 18 ms 3420 KB Output is correct
21 Correct 30 ms 5192 KB Output is correct
22 Correct 20 ms 3420 KB Output is correct
23 Correct 18 ms 3932 KB Output is correct
24 Correct 18 ms 3672 KB Output is correct
25 Correct 17 ms 3160 KB Output is correct
26 Correct 30 ms 4188 KB Output is correct
27 Correct 32 ms 4864 KB Output is correct
28 Correct 32 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 0 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 0 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 0 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 6 ms 5056 KB Output is correct
17 Correct 24 ms 4160 KB Output is correct
18 Correct 13 ms 3676 KB Output is correct
19 Correct 12 ms 3580 KB Output is correct
20 Correct 18 ms 3420 KB Output is correct
21 Correct 30 ms 5192 KB Output is correct
22 Correct 20 ms 3420 KB Output is correct
23 Correct 18 ms 3932 KB Output is correct
24 Correct 18 ms 3672 KB Output is correct
25 Correct 17 ms 3160 KB Output is correct
26 Correct 30 ms 4188 KB Output is correct
27 Correct 32 ms 4864 KB Output is correct
28 Correct 32 ms 5464 KB Output is correct
29 Correct 1994 ms 203076 KB Output is correct
30 Correct 1919 ms 203844 KB Output is correct
31 Correct 1551 ms 163708 KB Output is correct
32 Correct 2212 ms 249064 KB Output is correct
33 Correct 1115 ms 124236 KB Output is correct
34 Correct 2267 ms 225760 KB Output is correct
35 Execution timed out 4112 ms 260092 KB Time limit exceeded
36 Halted 0 ms 0 KB -