Submission #1224994

#	Time	Username	Problem	Language	Result	Execution time	Memory
1224994		Sharky	Radio Towers (IOI22_towers)	C++20	0 / 100	202 ms	2344 KiB

towers

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

int n;
vector<int> h;

const int N = 1e5 + 5;

int ps[N], v[N];

void init(int _n, std::vector<int> H) {
    n = _n;
    h = H;
    for (int i = 0; i < n; i++) {
        bool can_lease = 1;
        if (i && h[i - 1] < h[i]) can_lease = 0;
        if (i + 1 < n && h[i + 1] > h[i]) can_lease = 0;
        if (!can_lease) v[i] = 1;
    }
    ps[0] = v[0];
    for (int i = 1; i < n; i++) ps[i] = ps[i - 1] + v[i];
}

int max_towers(int L, int R, int D) {
    if (L == R) return 1;
    int res = ps[R] - (!L ? 0 : ps[L - 1]);
    res -= v[L], res -= v[R];
    if (h[L + 1] > h[L]) res++;
    if (h[R - 1] > h[R]) res++;
    return res;
}

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