Submission #771427

#	Time	Username	Problem	Language	Result	Execution time	Memory
771427		PurpleCrayon	Radio Towers (IOI22_towers)	C++17	27 / 100	4067 ms	1572 KiB

towers

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

#define sz(v) int(v.size())
#define ar array
typedef long long ll;
const int N = 1e5+10, MOD = 1e9+7;
const ll INF = 1e18+10;

int n, a[N];

void init(int _n, vector<int> H) {
    n = _n;
    for (int i = 0; i < n; i++) {
        a[i] = H[i];
    }
}

int max_towers(int l, int r, int d) {
    int ans = 1;
    int cur = MOD;
    bool small = 1;
    for (int i = l; i <= r; i++) {
        if (small) {
            if (a[i] <= cur) {
                cur = a[i];
            } else {
                if (a[i] >= cur + d) {
                    cur = a[i];
                    small ^= 1;
                }
            }
        } else {
            if (a[i] >= cur) {
                cur = a[i];
            } else {
                if (a[i] <= cur - d) {
                    cur = a[i];
                    small ^= 1;
                    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