Submission #302381

#	Time	Username	Problem	Language	Result	Execution time	Memory
302381		errorgorn	Arcade (NOI20_arcade)	C++14	100 / 100	275 ms	20520 KiB

Arcade

//雪花飄飄北風嘯嘯

//天地一片蒼茫



#include <bits/stdc++.h>

#include <ext/pb_ds/assoc_container.hpp>

#include <ext/pb_ds/tree_policy.hpp>

#include <ext/rope>

using namespace std;

using namespace __gnu_pbds;

using namespace __gnu_cxx;

#define ll long long

#define ii pair<ll,ll>

#define iii pair<ii,ll>

#define fi first

#define se second

#define endl '\n'

#define debug(x) cout << #x << " is " << x << endl;



#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))

#define all(x) (x).begin(),(x).end()

#define sz(x) (int)(x).size()



ll MAX(ll a){return a;}

ll MIN(ll a){return a;}

template<typename... Args>

ll MAX(ll a,Args... args){return max(a,MAX(args...));}

template<typename... Args>

ll MIN(ll a,Args... args){return min(a,MIN(args...));}



#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>



mt19937 rng(chrono::system_clock::now().time_since_epoch().count());



int n;

int arr[500005];

int t[500005];



ii pos[500005];



int main(){

	ios::sync_with_stdio(0);

	cin.tie(0);

	cout.tie(0);

	

	cin>>n>>n;

	rep(x,0,n) cin>>t[x];

	rep(x,0,n) cin>>arr[x];

	

	rep(x,0,n){

		pos[x]=ii(arr[x]-t[x],arr[x]+t[x]);

		//cout<<pos[x].fi<<" "<<pos[x].se<<endl;

	}

	

	sort(pos,pos+n,[](ii i,ii j){

		if (i.fi!=j.fi) return i.fi<j.fi;

		else return i.se>j.se;

	});

	

	vector<int> v;

	rep(x,0,n){

		int it=pos[x].se;

		

		if (v.empty() || v.back()<it) v.push_back(it);

		else v[lower_bound(all(v),it)-v.begin()]=it;

	}

	

	cout<<sz(v)<<endl;

}

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 14 / 14
• Subtask 6: 20 / 20
• Subtask 7: 15 / 15