#include <algorithm>
#include <cstdio>
#include <cstring>
#define ll long long
int n, k;
int a[200007];
int ans[200007];
int main() {
    scanf("%d%d", &n, &k);
    for (int i = 1; i <= n; ++i) {
        scanf("%d", &a[i]);
    }
    std::sort(a + 1, a + n + 1);
    n = std::unique(a + 1, a + n + 1) - a - 1;
    for (int i = 1, j = 0; i <= n; ++i) {
        for (; j < i && a[i] - a[j + 1] > k; ++j) 
            ;
        ans[i] = ans[j] + 1;
    }
    printf("%d\n", ans[n]);
    return 0;
}

判断题

当输入为 3 1 3 2 1 时，输出结果为 $2$。（ ）

{{ select(1) }}

• 正确
• 错误