Submission #629454

#	Time	Username	Problem	Language	Result	Execution time	Memory
629454		handlename	Radio Towers (IOI22_towers)	C++17	27 / 100	4074 ms	1488 KiB

towers

#include <bits/stdc++.h>
#include "towers.h"
using namespace std;
#define pb push_back
#define mp make_pair
 
int n,arr[100001];
int k;
void init(int N,vector<int> H){
	n=N;
	for (int i=1;i<=n;i++){
		arr[i]=H[i-1];
	}
	k=1;
	while (k<=n && arr[k+1]>arr[k]){
		k++;
	}
	for (int i=k+1;i<=n;i++){
		if (arr[i]>arr[i-1]){
			k=-1;
		}
	}
}
int max_towers(int l,int r,int d){
	l++;
	r++;
	if (k!=-1){
		if (l>=k || r<=k) return 1;
		if (arr[l]<=arr[k]-d && arr[r]<=arr[k]-d) return 2;
		return 1;
	}
	int ans=1,smol=arr[l],tall=arr[l];
	for (int i=l+1;i<=r;i++){
		if (tall<smol+d){
			smol=min(smol,arr[i]);
			tall=arr[i];
		}
		tall=max(tall,arr[i]);
		if (tall>=smol+d && tall>=arr[i]+d){
			smol=arr[i];
			tall=arr[i];
			ans++;
		}
	}
	return ans;
}

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