Submission #836574

#	Time	Username	Problem	Language	Result	Execution time	Memory
836574		tengiz05	Radio Towers (IOI22_towers)	C++17	14 / 100	729 ms	2000 KiB

towers

#include "towers.h"

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

vector<int> h;
int n;
vector<int> a;
void init(int N, vector<int> H) {
    n = N;
    h = H;
    a.resize(n);
    for (int i = 1; i < n - 1; i++) {
        if ((h[i - 1] < h[i]) != (h[i] < h[i + 1])) {
            a[i]++;
        }
    }
    for (int i = 1; i < n; i++) {
        a[i] += a[i - 1];
    }
}

int max_towers(int l, int r, int D) {
    if (l == r) {
        return 1;
    }
    int sum = a[r - 1] - a[l];
    // cout << sum << "\n";
    if (h[l] > h[l + 1]) {
        sum--;
    }
    return max(1, (sum + 3) / 2);
}

• 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