ccfcsp 202009-2 因子化简

#include <bits/stdc++.h>
using namespace std;
const int N = 1005;
int n, k, t, xl, yd, xr, yu;
struct people
{
    int id;
    int cishu;
} p[25];

int main()
{
    cin >> n >> k >> t >> xl >> yd >> xr >> yu;
    int ans1 = 0, ans2 = 0;
    for (int i = 0; i < n; i++)
    {
        p[i].id = i;
        int xx, yy;
        int lianxu = 0;
        int tt = 0;
        for (int j = 0; j < t; j++)
        {
            cin >> xx >> yy;
            if (xx >= xl && xx <= xr && yy >= yd && yy <= yu)
            {
                if (lianxu == 0)
                {
                    lianxu++;
                    tt = j;
                }
                else if (lianxu > 0 && tt == j - 1)
                { // 之前有&&上一个t为上一时刻
                    lianxu++;
                    tt = j;
                }
                else if (lianxu > 0 && tt != j - 1)
                { // 不连续
                    p[i].cishu = max(p[i].cishu, lianxu);
                    lianxu = 1;
                    tt = j;
                }
            }
        }
        p[i].cishu = max(p[i].cishu, lianxu);
        lianxu = 0;
        tt = 0;
    }
    for (int i = 0; i < n; i++)
    {
        if (p[i].cishu > 0)
            ans1++;
        if (p[i].cishu >= k)
            ans2++;
    }
    cout << ans1 << endl
         << ans2;
}

（好简单。。还以为要用二维前缀和。。）