poj2398

同2318

在其基础上，输入需要排序，输出稍复杂

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
using namespace std;

#define maxn 5005

struct Elem
{
    int cnt; //point count
    int num; //box num
    bool operator < (const Elem &a) const
    {
        return cnt < a.cnt;
    }
}elem[maxn];

struct Line
{
    int u, d;
    bool operator < (const Line &a) const
    {
        return u < a.u;
    }
} line[maxn];

int n, m, x1, x2, y1, y2;
int toy[maxn];
int box_cnt[maxn];
int elem_num;

bool left(int x, int y, Line a)
{
    if (x < a.d + (y - y2) * (a.u - a.d) * 1.0 / (y1 - y2))
        return true;
    return false;
}

int binarysearch(int x, int y)
{
    int l = 0, r = n;
    int mid;

    while (l < r)
    {
        mid = (l + r) / 2;
        if (left(x, y, line[mid]))
            r = mid;
        else
            l = mid + 1;
    }
    return l;
}

int main()
{
    //freopen("t.txt", "r", stdin);
    while (scanf("%d", &n), n != 0)
    {
        memset(toy, 0, sizeof(toy));
        scanf("%d%d%d%d%d", &m, &x1, &y1, &x2, &y2);
        for (int i = 0; i < n; i++)
            scanf("%d%d", &line[i].u, &line[i].d);
        sort(line, line + n);
        for (int i = 0; i < m; i++)
        {
            int x, y;
            scanf("%d%d", &x, &y);
            toy[binarysearch(x, y)]++;
        }
        memset(box_cnt, 0, sizeof(box_cnt));
        for (int i = 0; i <= n; i++)
            box_cnt[toy[i]]++;
        elem_num = 0;
        for (int i = 1; i <= n; i++)
            if (box_cnt[i] > 0)
            {
                elem[elem_num].cnt = i;
                elem[elem_num].num = box_cnt[i];
                elem_num++;
            }    
        sort(elem, elem + elem_num);
        puts("Box");
        for (int i = 0; i < elem_num; i++)
            printf("%d: %d
", elem[i].cnt, elem[i].num);
    }
    return 0;
}