제출 #1035065

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1035065		irmuun	송신탑 (IOI22_towers)	C++17	11 / 100	4090 ms	2768 KiB

towers

#include<bits/stdc++.h>
#include "towers.h"

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int n;
vector<int>h;
vector<pair<int,int>>v;
vector<bool>used;

void init(int N,vector<int>H){
    n=N; h=H;
    used.resize(n);
    for(int i=0;i<n;i++){
        v.pb({H[i],i});
    }
    sort(all(v));
}
int max_towers(int L,int R,int D){
    fill(all(used),0);
    int ans=0;
    for(auto [x,i]:v){
        if(i<L||i>R) continue;
        bool add=true;
        int mx=0;
        for(int j=i-1;j>=L;j--){
            if(used[j]){
                if(mx<x+D){
                    add=false;
                }
            }
            mx=max(mx,h[j]);
        }
        mx=0;
        for(int j=i+1;j<=R;j++){
            if(used[j]){
                if(mx<x+D){
                    add=false;
                }
            }
            mx=max(mx,h[j]);
        }
        if(add){
            ans++;
            used[i]=true;
        }
    }
    return ans;
}

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