제출 #1195341

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1195341		ByeWorld	송신탑 (IOI22_towers)	C++20	14 / 100	254 ms	1828 KiB

towers

#include "towers.h"
#include <bits/stdc++.h>
#define ll long long
#define fi first 
#define se second
#define pb push_back
using namespace std;
typedef pair<ll,ll> pii;
typedef pair<ll,pii> ipii;
const int MAXN = 3e5+100;
const int LOG = 19;
const ll INF = 2e18+10;
const int INF2 = 2e9+10;
void chmx(auto &a, auto b){ a = max(a, b); }
void chmn(auto &a, auto b){ a = min(a, b); }

int n, h[MAXN], pr[MAXN];

void init(int N, std::vector<int> H) {
	n = N;
	for(int i=1; i<=n; i++){
		h[i] = H[i-1];
	}
	h[0] = h[n+1] = INF2;
	for(int i=1; i<=n; i++){
		pr[i] = pr[i-1];
		if(h[i] < h[i+1] && h[i] < h[i-1]) pr[i]++;
	}
}

int dp[MAXN];

int max_towers(int L, int R, int D) {
	int l = L+1, r = R+1, d = D;
	if(l==r || l+1==r) return 1;
	int ANS = ANS = pr[r-1]-pr[l];
	if(h[l] < h[l+1]) ANS++;
	if(h[r] < h[r-1]) ANS++;
	return ANS;
}

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