Submission #764224

#	Time	Username	Problem	Language	Result	Execution time	Memory
764224		raysh07	Radio Towers (IOI22_towers)	C++17	14 / 100	828 ms	1872 KiB

towers

#include "towers.h"
#include <bits/stdc++.h>
using namespace std;

const int maxn = 1e5 + 69;
int a[maxn], p[maxn];
int n;
 
void init(int N, vector<int> H) {
    n = N;
    for (int i = 0; i < N; i++){
        a[i + 1] = H[i];
    }
    
    for (int i = 2; i < n; i++){
        p[i] = (a[i] < a[i - 1]) && (a[i] < a[i + 1]);
    }
    
    for (int i = 1; i <= n; i++) p[i] += p[i - 1];
}
 
int max_towers(int l, int r, int D) {
    l++;
    r++;
    if (D != 1) return 0;
    
    if (l == r) return 1;
    
    int ans = p[r - 1] - p[l];
    if (a[l] < a[l + 1]) ans++;
    if (a[r] < a[r - 1]) ans++;
    return ans;
}

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