Submission #26394

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
26394	2017-06-29T18:52:17 Z	pacu	Cultivation (JOI17_cultivation)	C++	15 / 100	2000 ms	2312 KB

cultivation

#include <iostream>
#include <algorithm>
#include <set>
using namespace std;

int N,rows,cols;
int x[300],y[300];
int xid[300];
int yid[300];

bool cmpx(int a,int b)
{
	return x[a]<x[b];
}
bool cmpy(int a,int b)
{
	return y[a]<y[b];
}

int cx[600];
int cNorth[600];
int cSouth[600];
int cSum[600];
int cid[600];
int C;

void getColumnVals(int k,int loc)
{
	cx[C] = loc;
	cSum[C] = 0;
	int pre = -1;
	for(int j=0;j<N;j++)
		if(x[yid[j]] <= loc && x[yid[j]] + k >= loc)
		{
			cSum[C] = max(cSum[C],y[yid[j]]-pre-1);
			if(pre==-1) cNorth[C] = y[yid[j]];
			pre = y[yid[j]];
		}
	cSouth[C] = rows-pre-1;
	cSum[C] = max(cSum[C],rows-pre-1);
	if(pre==-1) cSum[C] = cNorth[C] = cSouth[C] = 2000000000;
//	cout << loc << ": " << cSum[C] << ' ' << cNorth[C] << ' ' << cSouth[C] << '\n';
	C++;
}

bool cmpc(int a,int b)
{
	return cx[a]<cx[b];
}

int queSum[600];
int queNorth[600];
int queSouth[600];
int backSum,backNorth,backSouth,topSum,topNorth,topSouth;

set<int> visk;

int getMinSum(int k)
{
	if(visk.find(k) != visk.end()) return 2000000000;
	visk.insert(k);
	C = 0;
	for(int i=0;i<N;i++)
		getColumnVals(k,x[xid[i]]);
	for(int i=0;i<N;i++)
		getColumnVals(k,x[xid[i]]+k+1);
	for(int i=0;i<C;i++)
		cid[i] = i;
	sort(cid,cid+C,cmpc);
	backSum = backNorth = backSouth = 0;
	topSum = topNorth = topSouth = 0;
	int ans = 2000000000;
	for(int i=C-1;i>=0;i--)
	{
		int cur = cid[i];
		while(backSum < topSum && cx[queSum[backSum]]-cx[cur] >= cols)
			backSum++;
		while(backNorth < topNorth && cx[queNorth[backNorth]]-cx[cur] >= cols)
			backNorth++;
		while(backSouth < topSouth && cx[queSouth[backSouth]]-cx[cur] >= cols)
			backSouth++;
		while(backSum < topSum && cSum[cur] >= cSum[queSum[topSum-1]])
			topSum--;
		while(backNorth < topNorth && cNorth[cur] >= cNorth[queNorth[topNorth-1]])
			topNorth--;
		while(backSouth < topSouth && cSouth[cur] >= cSouth[queSouth[topSouth-1]])
			topSouth--;
		queSum[topSum++] = cur;
		queNorth[topNorth++] = cur;
		queSouth[topSouth++] = cur;
		ans = min(ans,max(cSum[queSum[backSum]],cNorth[queNorth[backNorth]]+cSouth[queSouth[backSouth]]));
	}
	return ans+k;
}

int main()
{
	cin >> rows >> cols;
	cin >> N;
	for(int i=0;i<N;i++)
	{
		cin >> y[i] >> x[i];
		y[i]--,x[i]--;
		xid[i] = yid[i] = i;
	}
	sort(xid,xid+N,cmpx);
	sort(yid,yid+N,cmpy);
	int ans = 2000000000;
	for(int i=0;i<N;i++)
		for(int j=0;j<N;j++)
		{
			if(x[xid[j]]>x[xid[i]])
				ans = min(ans,getMinSum(x[xid[j]]-x[xid[i]]-1));
			ans = min(ans,getMinSum(x[xid[i]]+cols-1-x[xid[j]]));
		}
	cout << ans << '\n';
}

Subtask #1

5.0 / 5.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	2048 KB	Output is correct
2	Correct	0 ms	2048 KB	Output is correct
3	Correct	0 ms	2048 KB	Output is correct
4	Correct	0 ms	2048 KB	Output is correct
5	Correct	0 ms	2048 KB	Output is correct
6	Correct	0 ms	2048 KB	Output is correct
7	Correct	0 ms	2048 KB	Output is correct
8	Correct	0 ms	2048 KB	Output is correct
9	Correct	0 ms	2048 KB	Output is correct
10	Correct	0 ms	2048 KB	Output is correct
11	Correct	0 ms	2048 KB	Output is correct
12	Correct	0 ms	2048 KB	Output is correct
13	Correct	0 ms	2048 KB	Output is correct
14	Correct	0 ms	2048 KB	Output is correct
15	Correct	0 ms	2048 KB	Output is correct
16	Correct	0 ms	2048 KB	Output is correct

Subtask #2

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	2048 KB	Output is correct
2	Correct	0 ms	2048 KB	Output is correct
3	Correct	0 ms	2048 KB	Output is correct
4	Correct	0 ms	2048 KB	Output is correct
5	Correct	0 ms	2048 KB	Output is correct
6	Correct	0 ms	2048 KB	Output is correct
7	Correct	0 ms	2048 KB	Output is correct
8	Correct	0 ms	2048 KB	Output is correct
9	Correct	0 ms	2048 KB	Output is correct
10	Correct	0 ms	2048 KB	Output is correct
11	Correct	0 ms	2048 KB	Output is correct
12	Correct	0 ms	2048 KB	Output is correct
13	Correct	0 ms	2048 KB	Output is correct
14	Correct	0 ms	2048 KB	Output is correct
15	Correct	0 ms	2048 KB	Output is correct
16	Correct	0 ms	2048 KB	Output is correct
17	Correct	0 ms	2048 KB	Output is correct
18	Correct	0 ms	2048 KB	Output is correct
19	Correct	0 ms	2048 KB	Output is correct
20	Correct	0 ms	2048 KB	Output is correct
21	Correct	0 ms	2048 KB	Output is correct
22	Correct	6 ms	2048 KB	Output is correct
23	Correct	0 ms	2048 KB	Output is correct
24	Correct	16 ms	2048 KB	Output is correct
25	Correct	9 ms	2048 KB	Output is correct
26	Correct	33 ms	2048 KB	Output is correct
27	Correct	29 ms	2048 KB	Output is correct
28	Correct	13 ms	2048 KB	Output is correct
29	Correct	29 ms	2048 KB	Output is correct
30	Correct	33 ms	2048 KB	Output is correct
31	Correct	33 ms	2048 KB	Output is correct
32	Correct	33 ms	2048 KB	Output is correct

Subtask #3

0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	2048 KB	Output is correct
2	Correct	0 ms	2048 KB	Output is correct
3	Correct	0 ms	2048 KB	Output is correct
4	Correct	0 ms	2048 KB	Output is correct
5	Correct	0 ms	2048 KB	Output is correct
6	Correct	0 ms	2048 KB	Output is correct
7	Correct	0 ms	2048 KB	Output is correct
8	Correct	0 ms	2048 KB	Output is correct
9	Correct	0 ms	2048 KB	Output is correct
10	Correct	0 ms	2048 KB	Output is correct
11	Correct	0 ms	2048 KB	Output is correct
12	Correct	0 ms	2048 KB	Output is correct
13	Correct	0 ms	2048 KB	Output is correct
14	Correct	0 ms	2048 KB	Output is correct
15	Correct	0 ms	2048 KB	Output is correct
16	Correct	0 ms	2048 KB	Output is correct
17	Correct	0 ms	2048 KB	Output is correct
18	Correct	0 ms	2048 KB	Output is correct
19	Correct	0 ms	2048 KB	Output is correct
20	Correct	0 ms	2048 KB	Output is correct
21	Correct	0 ms	2048 KB	Output is correct
22	Correct	6 ms	2048 KB	Output is correct
23	Correct	0 ms	2048 KB	Output is correct
24	Correct	16 ms	2048 KB	Output is correct
25	Correct	9 ms	2048 KB	Output is correct
26	Correct	33 ms	2048 KB	Output is correct
27	Correct	29 ms	2048 KB	Output is correct
28	Correct	13 ms	2048 KB	Output is correct
29	Correct	29 ms	2048 KB	Output is correct
30	Correct	33 ms	2048 KB	Output is correct
31	Correct	33 ms	2048 KB	Output is correct
32	Correct	33 ms	2048 KB	Output is correct
33	Execution timed out	2000 ms	2312 KB	Execution timed out
34	Halted	0 ms	0 KB	-

Subtask #4

0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	2048 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #5

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	0 ms	2048 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #6

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	2048 KB	Output is correct
2	Correct	0 ms	2048 KB	Output is correct
3	Correct	0 ms	2048 KB	Output is correct
4	Correct	0 ms	2048 KB	Output is correct
5	Correct	0 ms	2048 KB	Output is correct
6	Correct	0 ms	2048 KB	Output is correct
7	Correct	0 ms	2048 KB	Output is correct
8	Correct	0 ms	2048 KB	Output is correct
9	Correct	0 ms	2048 KB	Output is correct
10	Correct	0 ms	2048 KB	Output is correct
11	Correct	0 ms	2048 KB	Output is correct
12	Correct	0 ms	2048 KB	Output is correct
13	Correct	0 ms	2048 KB	Output is correct
14	Correct	0 ms	2048 KB	Output is correct
15	Correct	0 ms	2048 KB	Output is correct
16	Correct	0 ms	2048 KB	Output is correct
17	Correct	0 ms	2048 KB	Output is correct
18	Correct	0 ms	2048 KB	Output is correct
19	Correct	0 ms	2048 KB	Output is correct
20	Correct	0 ms	2048 KB	Output is correct
21	Correct	0 ms	2048 KB	Output is correct
22	Correct	6 ms	2048 KB	Output is correct
23	Correct	0 ms	2048 KB	Output is correct
24	Correct	16 ms	2048 KB	Output is correct
25	Correct	9 ms	2048 KB	Output is correct
26	Correct	33 ms	2048 KB	Output is correct
27	Correct	29 ms	2048 KB	Output is correct
28	Correct	13 ms	2048 KB	Output is correct
29	Correct	29 ms	2048 KB	Output is correct
30	Correct	33 ms	2048 KB	Output is correct
31	Correct	33 ms	2048 KB	Output is correct
32	Correct	33 ms	2048 KB	Output is correct
33	Execution timed out	2000 ms	2312 KB	Execution timed out
34	Halted	0 ms	0 KB	-