제출 #158461

#제출 시각아이디문제언어결과실행 시간메모리
158461dcjRasvjeta (COCI17_rasvjeta)C++14
10 / 50
3 ms376 KiB
#include <iostream>
using namespace std;

int main()
{
	int N, M, K, X;
	cin >> N;
	cin >> M;
	cin >> K;
	int br=0, x, y=2*K+1;
	cin >> X;
		br+=(X-K-1)/y+bool(X>K);
	x=X;
	while(--M>1) {
		cin >> X;
		br+=(X-x-1)/y+bool((X-x)%y==0);
		x=X;
	}
	cin >> X;
	br+=(N-X-K-1)/y+bool(N-X>K);

	cout << br;
	return 0;
}
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