hdoj1051Wooden Sticks



/*这道题目是先要排序的,按照长度或者重量排都可以,

当长度(重量)相同时就按照重量(长度)排,

从大到小或从小到大都可以!这里我懂的,没有问题!

排序之后,问题就可以简化,(假设按照长度不等时长度排,

长度等是按照重量排,我假设按照从大到小来排!)即求排序

后的所有的重量值最少能表示成几个集合。长度就不用再管了,

从数组第一个数开始遍历,只要重量值满足条件,那么这两个

木棍就满足条件!*/

<span style="font-size:18px;">#include<stdio.h>
#include<algorithm>
#include<string.h>
using namespace std;
#define maxn 5010
struct node{
 int l,w;
}stk[maxn];
bool cmp(node y,node x){
 if(x.l<y.l) return true;
 if(x.l==y.l&&x.w<y.w) return true;
 return false;
}
int main()
{
 int visit[5010],t,n,sum;
 scanf("%d",&t);
 while(t--)
 {
  memset(visit,0,sizeof(visit));
        memset(&stk,0,sizeof(&stk));
        scanf("%d",&n);
        for(int i=0;i<n;i++)
        scanf("%d %d",&stk[i].l,&stk[i].w);
        sort(stk,stk+n,cmp);
        sum=0;
        for(int i=0;i<n;i++)
        {
            if(!visit[i])
            {
                for(int j=i;j<n;j++)
                if(stk[j].l>=stk[i].l&&stk[j].w>=stk[i].w&&!visit[j])
                visit[j]=1,stk[i].l=stk[j].l,stk[i].w=stk[j].w;
                sum++; //这个循环是重点。
            }
        }
        printf("%d\n",sum);
 }
    return 0;
}   </span>

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时间: 2024-10-07 07:57:24

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