Submission #5694

#	Time	Username	Problem	Language	Result	Execution time	Memory
5694		cki86201	Orchard (NOI14_orchard)	C++98	25 / 25	588 ms	9056 KiB

orchard

#include<stdio.h>
#include<algorithm>
#include<vector>
using namespace std;

vector<vector <int> > p;
int n, m, ans = ~0u>>1;

inline int get(int x1,int y1,int x2,int y2){return p[x2][y2] - p[x2][y1-1] - p[x1-1][y2] + p[x1-1][y1-1];}

int main()
{
	scanf("%d%d",&n,&m);
	p.resize(n+1);p[0].resize(m+1);
	int i, j;
	for(i=1;i<=n;i++){
		p[i].resize(m+1);
		for(j=1;j<=m;j++)scanf("%d",&p[i][j]);
	}
	for(i=1;i<=n;i++)for(j=1;j<=m;j++)p[i][j] += p[i][j-1] + p[i-1][j] - p[i-1][j-1];
	for(i=1;i<=n;i++){
		for(j=i;j<=n;j++){
			int now = 0;
			for(int k=1;k<=m;k++){
				ans = std::min(ans, (j-i+1) * (k-now) - 2 * get(i, now+1, j, k) + p[n][m]);
				if(get(i, now+1, j, k)*2 < (j-i+1) * (k-now))now = k;
			}
		}
	}
	printf("%d",ans);
	return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 5 / 5
• Subtask 4: 3 / 3
• Subtask 5: 4 / 4
• Subtask 6: 5 / 5