Submission #912322

#	Time	Username	Problem	Language	Result	Execution time	Memory
912322		vjudge1	Wish (LMIO19_noras)	C++17	38 / 100	1051 ms	6944 KiB

noras

#include <bits/stdc++.h>
#define f first
#define s second	
#define ent '\n'
#define int long long

#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")

using namespace std;
typedef long long ll;
const int mx=1e6+12;
const int mod=1e9+7;
int dx[]={1,-1,0,0,1,-1,1,-1};
int dy[]={0,0,1,-1,1,-1,-1,1};

int cal[mx];
int L[mx];
int R[mx];
int x[mx];
int y[mx];
int a[mx];
int b[mx];
int n,m,k;

bool check(int x,int y){
	if(max(x,y)>k)return 0;
	return x*x+y*y<=k*k;
}

bool check(int x1,int y1,int x2,int y2){
	__int128 val=(__int128)x1*(__int128)x1+(__int128)y1*(__int128)y1;
	__int128 cal=(__int128)x2*(__int128)x2+(__int128)y2*(__int128)y2;
	if(val>=cal)return 1;
	return 0;
}

void Press_Fn_with_F11(){
	cin>>n>>k;
	int ans=0;
	for(int i=1;i<=n;i++){
		cin>>x[i]>>y[i]>>a[i]>>b[i];
		a[i]-=x[i];
		b[i]-=y[i];
		int l=0,r=2e9,pos0=0;
		while(r-l>10){
			int m1=l+(r-l)/3,m2=r-(r-l)/3;
			if(check(x[i]+m1*a[i],y[i]+m1*b[i],x[i]+m2*a[i],y[i]+m2*b[i])){
				l=m1;
			}
			else r=m2;
		}
		pos0=l;
		for(int v=l+1;v<=r;v++){
			if(check(pos0*a[i]+x[i],pos0*b[i]+y[i],v*a[i]+x[i],v*b[i]+y[i])){
				pos0=v;
			}
		}
		if(!check(x[i]+pos0*a[i],y[i]+pos0*b[i])){
			continue;
		}
		int L=pos0,R=pos0;
		for(int l=0,r=pos0;l<=r;){
			int mid=l+r>>1;
			if(check(mid*a[i]+x[i],mid*b[i]+y[i])){
				L=mid;
				r=mid-1;
			}
			else l=mid+1;
		}
		for(int l=pos0,r=2e9;l<=r;){
			int mid=l+r>>1;
			if(check(mid*a[i]+x[i],mid*b[i]+y[i])){
				R=mid;
				l=mid+1;
			}
			else r=mid-1;
		}
		int mnl=1e18,mnr=-1e18;
		for(int h=L;h<=min(R,(int)4e4);h++){
			if(check(x[i]+a[i]*h,y[i]+b[i]*h)){
				ans=max(ans,++cal[h]);
				assert(h>=L && h<=R);
				mnl=min(mnl,h);
				mnr=min(mnr,h);
			}
			assert(check(x[i]+a[i]*h,y[i]+b[i]*h,pos0*a[i]+x[i],pos0*b[i]+y[i]));
		}
		assert(L==mnl);
	}
	cout<<ans<<ent;
	
}

signed main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int Alikhan_abi_crush=1;
	// cin>>Alikhan_abi_crush;
	while(Alikhan_abi_crush--){
		Press_Fn_with_F11();
	}
}

Compilation message (stderr)

noras.cpp: In function 'void Press_Fn_with_F11()':
noras.cpp:64:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   64 |    int mid=l+r>>1;
      |            ~^~
noras.cpp:72:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   72 |    int mid=l+r>>1;
      |            ~^~

• Subtask 1: 23 / 23
• Subtask 2: 0 / 23
• Subtask 3: 15 / 15
• Subtask 4: 0 / 32
• Subtask 5: 0 / 7