oj.uz

Submission #856096

# Submission time Handle Problem Language Result Execution time Memory
856096 2023-10-02T16:35:08 Z vjudge1 Telefoni (COCI17_telefoni) C++17
80 / 80
 14 ms 5468 KB 
#include <bits/stdc++.h>
using namespace std;
#define sp << " " << 
#define int long long
#define vi vector<int>
#define pb push_back
#define F(xxx,yyy) for (int xxx=1;xxx<=yyy;xxx++)
#define pii pair<int,int>
#define all(x) x.begin()+1,x.end()
const int N = 4e5+1;


void solve() {
	int n,d;
	cin >> n >> d;
	vi a(n+1);
	F(i,n) cin >> a[i];
	vi l(n+1);
	int lst = 1;
	F(i,n) {
		l[i] = lst;
		if (a[i]) lst = i;
	}
	int ans = 0;
	int ptr = n;
	while (ptr > 1) {
		if (l[ptr] < ptr-d) {
			ans++;
			ptr=ptr-d;
		}
		else ptr = l[ptr];
	}
	cout << ans << endl;	
}     	
                 
                 
                 
                 
                 
                 
                 
                 
                                
signed main() { 
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int t = 1;
    //cin >> t; 
    while (t --> 0) solve();
}

Subtask #1
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 13 ms 4956 KB Output is correct
9 Correct 13 ms 5468 KB Output is correct
10 Correct 14 ms 4956 KB Output is correct