제출 #124021

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
124021		MvC	Two Antennas (JOI19_antennas)	C++11	0 / 100	203 ms	21820 KiB

antennas

#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include<bits/stdc++.h>
//#include "rail.h"
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=2e5+50;
const int mod=1e9+7;
using namespace std;
int n,i,j,rs=-1,h[nmax],a[nmax],b[nmax];
vector<int>ad[nmax],re[nmax];
pair<int,int>p,st[4*nmax];
pair<int,int> merge(pair<int,int>x,pair<int,int>y)
{
	return mkp(max(x.fr,y.fr),min(x.sc,y.sc));
}
void upd(int x,int l,int r,int p,int v)
{
	if(l>r)return;
	if(l==r)
	{
		if(v==-1)st[x]=mkp(0,inf);
		else st[x]=mkp(v,v);
		return;
	}
	int mid=(l+r)/2;
	if(p<=mid)upd(2*x,l,mid,p,v);
	else upd(2*x+1,mid+1,r,p,v);
	st[x]=merge(st[2*x],st[2*x+1]);
}
pair<int,int> qry(int x,int l,int r,int tl,int tr)
{
	if(tl>r || tr<l)return mkp(0,inf);
	if(tl<=l && r<=tr)return st[x];
	int mid=(l+r)/2;
	return merge(qry(2*x,l,mid,tl,tr),qry(2*x+1,mid+1,r,tl,tr));
}
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n;
	for(i=1;i<=n;i++)
	{
		cin>>h[i]>>a[i]>>b[i];
		ad[min(n+1,i+a[i])].pb(i);
		re[min(n+1,i+b[i]+1)].pb(i);
	}
	for(i=1;i<=4*n;i++)st[i]=mkp(0,inf);
	for(i=1;i<=n;i++)
	{
		for(j=0;j<ad[i].size();j++)
		{
			upd(1,1,n,ad[i][j],h[ad[i][j]]);
		}
		for(j=0;j<re[i].size();j++)
		{
			upd(1,1,n,re[i][j],-1);
		}
		if(i-a[i]>=1)
		{
			p=qry(1,1,n,max(i-b[i],1),max(i-a[i],1));
			rs=max(rs,abs(p.fr-h[i]));
			rs=max(rs,abs(p.sc-h[i]));
		}
	}
	cout<<rs<<endl;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

antennas.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
antennas.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")
 
antennas.cpp: In function 'int main()':
antennas.cpp:68:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<ad[i].size();j++)
           ~^~~~~~~~~~~~~
antennas.cpp:72:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<re[i].size();j++)
           ~^~~~~~~~~~~~~

• Subtask 1: 0 / 2
• Subtask 2: 0 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 65