제출 #308948

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
308948		Hemimor	Lightning Rod (NOI18_lightningrod)	C++14	100 / 100	655 ms	192000 KiB

Main

#include <algorithm>
#include <iostream>
#include <iomanip>
#include <numeric>
#include <cassert>
#include <vector>
#include <random>
#include <cmath>
#include <stack>
#include <queue>
#include <set>
#include <map>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-8;
const ll mod=1e9+7;
const int dx[8]={-1,0,1,0,1,1,-1,-1},dy[8]={0,1,0,-1,1,-1,1,-1};

vi vin(int n,int d=0){
	vi a(n);
	for(int i=0;i<n;i++){
		cin>>a[i];
		a[i]-=d;
	}
	return a;
}

vl vlin(int n,int d=0){
	vl a(n);
	for(auto &i:a){
		cin>>i;
		i-=d;
	}
	return a;
}

vvi vvin(int n,int m){
	vvi a(n,vi(m));
	for(int i=0;i<n;i++) for(auto &j:a[i]) cin>>j;
	return a;
}

vvi gin(int n,int m,int d=1){
	vvi g(n);
	for(int i=0;i<m;i++){
		int u,v;
		cin>>u>>v;
		u-=d,v-=d;
		g[u].push_back(v);
		g[v].push_back(u);
	}
	return g;
}

void vout(vi a){
	int n=a.size();
	cout<<n<<" :";
	for(auto i:a) cout<<' '<<i;
	cout<<endl;
}

void vvout(vvi a){
	int n=a.size();
	for(int i=0;i<n;i++) vout(a[i]);
}

bool ingrid(int x,int y,int n,int m){
	return 0<=x&&x<n&&0<=y&&y<m;
}

int readInt() {
    int x=0;
	char ch=getchar_unlocked();
	bool s=1;
    while(ch<'0'||ch>'9'){if(ch=='-')s=0;ch=getchar_unlocked();}
    while(ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+ch-'0';ch=getchar_unlocked();}
    return s?x:-x;
}

int n;

int main(){
	n=readInt();
	stack<P> st;
	for(int i=0;i<n;i++){
		int x,y;
		x=readInt();
		y=readInt();
		bool B=1;
		while(!st.empty()){
			P p=st.top();
			int X=p.first,Y=p.second;
			if(x+y<=X+Y){
				B=0;
				break;
			}
			if(x-y<=X-Y) st.pop();
			else break;
		}
		if(B) st.push({x,y});
	}
	printf("%d\n",(int)st.size());
}

• Subtask 1: 4 / 4
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 26 / 26
• Subtask 6: 10 / 10
• Subtask 7: 20 / 20