「杂题乱刷」P8816

链接

没啥好说的,直接看代码吧。

点击查看代码
/*
Tips:
你数组开小了吗?
你MLE了吗?
你觉得是贪心,是不是该想想dp?
一个小时没调出来,是不是该考虑换题?
打 cf 不要用 umap!!!

记住,rating 是身外之物。

该冲正解时冲正解!

Problem:

算法:

思路:

*/
#include<bits/stdc++.h>
using namespace std;
//#define map unordered_map
#define forl(i,a,b) for(register long long i=a;i<=b;i++)
#define forr(i,a,b) for(register long long i=a;i>=b;i--)
#define forll(i,a,b,c) for(register long long i=a;i<=b;i+=c)
#define forrr(i,a,b,c) for(register long long i=a;i>=b;i-=c)
#define lc(x) x<<1
#define rc(x) x<<1|1
#define mid ((l+r)>>1)
#define cin(x) scanf("%lld",&x)
#define cout(x) printf("%lld",x)
#define lowbit(x) (x&-x)
#define pb push_back
#define pf push_front
#define IOS ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define endl '\n'
#define QwQ return 0;
#define ll long long
#define ull unsigned long long
#define lcm(x,y) x/__gcd(x,y)*y
#define Sum(x,y) 1ll*(x+y)*(y-x+1)/2
#define aty cout<<"Yes\n";
#define atn cout<<"No\n";
#define cfy cout<<"YES\n";
#define cfn cout<<"NO\n";
#define xxy cout<<"yes\n";
#define xxn cout<<"no\n";
#define printcf(x) x?cout<<"YES\n":cout<<"NO\n";
#define printat(x) x?cout<<"Yes\n":cout<<"No\n";
#define printxx(x) x?cout<<"yes\n":cout<<"no\n";
ll t;
/*
dp[i][j]表示目前到第 i 个点,用了 j 次的最大点数。 
*/
ll n,m,dp[510][110],ans;
struct node{
	ll x,y;
}a[510];
bool cmp(node x,node y)
{
	if(x.x==y.x)
		return x.y<y.y;
	return x.x<y.x;
}
void solve()
{
	cin>>n>>m;
	forl(i,1,n)
		cin>>a[i].x>>a[i].y;
	sort(a+1,a+1+n,cmp);
	forl(i,1,n)
		dp[i][0]=1;
	forl(i,1,n)
		forl(j,i+1,n)
			forl(k,0,m)
				if(a[i].x<=a[j].x && a[i].y<=a[j].y && (abs(a[i].x-a[j].x)+abs(a[i].y-a[j].y))-1+k<=m)
					dp[j][(abs(a[i].x-a[j].x)+abs(a[i].y-a[j].y))-1+k]=max(dp[j][(abs(a[i].x-a[j].x)+abs(a[i].y-a[j].y))-1+k],dp[i][k]+(abs(a[i].x-a[j].x)+abs(a[i].y-a[j].y)));
	forl(i,1,n)
		forl(j,0,m)
			ans=max(ans,dp[i][j]+m-j);
	cout<<ans<<endl;
}
int main()
{
	IOS;
	t=1;
//	cin>>t;
	while(t--)
		solve();
    /******************/
	/*while(L<q[i].l) */
	/*    del(a[L++]);*/
	/*while(L>q[i].l) */
	/*    add(a[--L]);*/
	/*while(R<q[i].r) */
	/*	  add(a[++R]);*/
	/*while(R>q[i].r) */
	/*    del(a[R--]);*/
    /******************/
	QwQ;
}
posted @ 2024-06-01 19:54  wangmarui  阅读(5)  评论(0编辑  收藏  举报