Submission #676145

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
676145	2022-12-29 13:36:53	LeonaRaging	Telefoni (COCI17_telefoni)	C++14	80 / 80	17 ms	1776 KiB

telefoni

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#include <bits/stdc++.h>
using namespace std;
#define db(val) "[" #val " = " << (val) << "] "
const int maxn = 3e5 + 4;
int n, d, nxt[maxn];
bool a[maxn];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n >> d;
    for (int i = 1; i <= n; i++)
      cin >> a[i];
    queue<int> q;
    for (int i = n; i >= 1; i--) {
      while (!q.empty() && q.front() > i + d)
        q.pop();
      nxt[i] = (!q.empty() ? q.front() : 0);
      if (a[i]) q.push(i);
    }
    int cur = 1, res = 0;
    while (cur < n) {
      if (nxt[cur]) cur = nxt[cur];
      else res++, cur = cur + d;
    }
    cout << res;
 
 
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• Subtask 1: 80 / 80