Submission #1169979

#	Time	Username	Problem	Language	Result	Execution time	Memory
1169979		user736482	Two Antennas (JOI19_antennas)	C++20	13 / 100	91 ms	65096 KiB

antennas

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define pb push_back
#define ff first
#define ss second
#define MOD 998244353
#define POT 4194304
#define INF 1000000019
#define INFL 1000000000000000099LL
 
ll n,q,a,b,c,d;
vector<pair<pair<ll,ll>,ll>>v;//przexial ,wys
ll co[2007][2007];
ll ans[2007][2007];

int main()
{
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n;
	for(ll i=0;i<n;i++){
		cin>>a>>b>>c;
		v.pb({{b,c},a});
	}	
	if(n<=2000){
		
		for(ll i=0;i<n;i++){
			for(ll j=0;j<n;j++){
				if(v[i].ff.ff<=abs(i-j) && abs(i-j)<=v[i].ff.ss && v[j].ff.ff<=abs(i-j) && abs(i-j)<=v[j].ff.ss){
					co[i][j]=abs(v[i].ss-v[j].ss);
				}
				else{
					co[i][j]=-1;
				}
			}
		}
		
		for(ll i=0;i<2007;i++){
			for(ll j=0;j<2007;j++)
				ans[i][j]=-1;
		}
		for(ll j=1;j<n;j++){
		for(ll i=0;j+i<n;i++){
			
				ans[i][i+j]=max(max(ans[i+1][i+j],ans[i][j+i-1]),co[i][i+j]);
			}
		}
		cin>>q;
	//	cout<<ans[2][4]<<"\n";
		for(ll i=0;i<q;i++){
			cin>>a>>b;
			a--;
			b--;
			cout<<ans[a][b]<<"\n";
		}
	}
    
    return 0;
}

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