哈尔滨理工大学软件与微电子学院程序设计竞赛——L.Defeat the monster【尺取】

题目传送门

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题解

• 滑动窗口跑一下即可

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AC-Code

#include 
using namespace std;
 
const int maxn = 2e5 + 7;
int arr[maxn];
int main() {
    int n;
    while (cin >> n) {
        for (int i = 1; i <= n; ++i) {
            cin >> arr[i];
        }
        sort(arr + 1, arr + 1 + n);
        int L = 1, R = 1;
        int ans = 0;
        while (R <= n) {
            if (arr[R] - arr[L] > 5) {
                ++L;
            }
            ans = max(R - L + 1, ans);
            ++R;
        }
        cout << ans << endl;
    }
}