Submission #1186683

#	Time	Username	Problem	Language	Result	Execution time	Memory
1186683		ByeWorld	Radio Towers (IOI22_towers)	C++20	11 / 100	4056 ms	10940 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;
void chmx(auto &a, auto b){ a = max(a, b); }
void chmn(auto &a, auto b){ a = min(a, b); }

int n, h[MAXN], st[MAXN][LOG+5];

void init(int N, std::vector<int> H) {
	n = N;
	for(int i=1; i<=n; i++){
		h[i] = H[i-1];
		st[i][0] = h[i];
	}
	for(int j=1; j<LOG; j++){
		for(int i=1; i+(1<<j)-1<=n; i++){
			st[i][j] = max(st[i][j-1], st[i+(1<<(j-1))][j-1]);
		}
	}
}

int dp[MAXN];

int max_towers(int L, int R, int D) {
	int l = L+1, r = R+1, d = D;
	int ANS = 1;
	dp[l] = 1;
	for(int i=l+1; i<=r; i++){
		int mx = h[i-1];
		dp[i] = 1;
		for(int j=i-2; j>=l; j--){
			if(max(h[i], h[j]) <= mx-d){ // bisa
				chmx(dp[i], dp[j]+1);
			}
			chmx(mx, h[j]);
		}
		chmx(ANS, dp[i]);
	}
	return ANS;
}

• Subtask 1: 0 / 4
• Subtask 2: 11 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 17
• Subtask 6: 0 / 19
• Subtask 7: 0 / 23