Submission #40399

#	Time	Username	Problem	Language	Result	Execution time	Memory
40399		szawinis	Rasvjeta (COCI17_rasvjeta)	C++14	50 / 50	2 ms	756 KiB

rasjveta

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

int n, m, k, ans;
bool mark[1001];
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> n >> m >> k;
	for(int i = 0, x; i < m; i++) {
		cin >> x;
		for(int j = max(x-k, 1); j <= min(x+k, n); j++) mark[j] = true;
	}
	int last = 0;
	mark[0] = true;
	for(int i = 1; i <= n; i++) {
		if(!mark[i] && mark[i-1]) last = i;
		else if(mark[i] && !mark[i-1]) ans += (i-last+2*k) / (2*k+1);
	}
	if(!mark[n]) ans += (n+1-last+2*k) / (2*k+1);
	cout << ans;
}

• Subtask 1: 50 / 50