hdu 4614 线段树+二分~

Vases and Flowers

Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)
Total Submission(s): 728    Accepted Submission(s): 251

Problem Description

　　Alice is so popular that she can receive many flowers everyday. She has N vases numbered from 0 to N-1. When she receive some flowers, she will try to put them in the vases, one flower in one vase. She randomly choose the vase A and try to put a flower in the vase. If the there is no flower in the vase, she will put a flower in it, otherwise she skip this vase. And then she will try put in the vase A+1, A+2, ..., N-1, until there is no flower left or she has tried the vase N-1. The left flowers will be discarded. Of course, sometimes she will clean the vases. Because there are too many vases, she randomly choose to clean the vases numbered from A to B(A <= B). The flowers in the cleaned vases will be discarded.

 

Input

　　The first line contains an integer T, indicating the number of test cases.
　　For each test case, the first line contains two integers N(1 < N < 50001) and M(1 < M < 50001). N is the number of vases, and M is the operations of Alice. Each of the next M lines contains three integers. The first integer of one line is K(1 or 2). If K is 1, then two integers A and F follow. It means Alice receive F flowers and try to put a flower in the vase A first. If K is 2, then two integers A and B follow. It means the owner would like to clean the vases numbered from A to B(A <= B).

 

Output

　　For each operation of which K is 1, output the position of the vase in which Alice put the first flower and last one, separated by a blank. If she can not put any one, then output 'Can not put any one.'. For each operation of which K is 2, output the number of discarded flowers. 
　　 Output one blank line after each test case.

 

Sample Input

   
   
   
   

    
    
    
    2
10 5
1 3 5
2 4 5
1 1 8
2 3 6
1 8 8
10 6
1 2 5
2 3 4
1 0 8
2 2 5
1 4 4
1 2 3
   
   
   
   

 

Sample Output

   
   
   
   

    
    
    
    [pre]3 7
2
1 9
4
Can not put any one.

2 6
2
0 9
4
4 5
2 3

[/pre]
   
   
   
   

 

Source

2013 Multi-University Training Contest 2

 

Recommend

zhuyuanchen520

 

刚学线段树，做出来不容易啊~~~

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
const int MAXN = 50005;
struct node
{
    int l,r;
    int sum;
    int flag;
    int mid()
    {
        return (l+r)>>1;
    }
};
node tree[MAXN*4];
inline void pushup(int pos)
{
    tree[pos].sum=tree[pos<<1].sum+tree[pos<<1|1].sum;
}
inline void pushdown(int pos)
{
    if(tree[pos].flag==1)
    {
        tree[pos<<1].flag=1;
        tree[pos<<1|1].flag=1;
        tree[pos<<1].sum=0;
        tree[pos<<1|1].sum=0;
        tree[pos].flag=-1;
    }
    else if(tree[pos].flag==0)
    {
        tree[pos<<1].flag=0;
        tree[pos<<1|1].flag=0;
        tree[pos<<1].sum=tree[pos<<1].r-tree[pos<<1].l+1;
        tree[pos<<1|1].sum=tree[pos<<1|1].r-tree[pos<<1|1].l+1;
        tree[pos].flag=-1;
    }
}
void build(int l,int r,int pos)
{
    tree[pos].l=l;
    tree[pos].r=r;
    if(l==r)
    {
        tree[pos].sum=1;
        tree[pos].flag=-1;
        return ;
    }
    int mid=tree[pos].mid();
    build(l,mid,pos<<1);
    build(mid+1,r,pos<<1|1);
    pushup(pos);
    tree[pos].flag=-1;
}

int query(int l,int r,int pos)
{
    if(tree[pos].flag==1)
        return 0;
    else if(tree[pos].flag==0)
        return r-l+1;
    if(l==tree[pos].l&&tree[pos].r==r)
    {
        return tree[pos].sum;
    }
    int mid=tree[pos].mid();
    if(r<=mid)
        return query(l,r,pos<<1);
    else if(l>mid)
        return query(l,r,pos<<1|1);
    else
        return query(l,mid,pos<<1)+query(mid+1,r,pos<<1|1);
}
void update(int l,int r,int x,int pos)
{
    if(tree[pos].l==l&&tree[pos].r==r)
    {
        tree[pos].flag=x;
        if(x==0)
            tree[pos].sum=r-l+1;
        else
            tree[pos].sum=0;
        return ;
    }
    pushdown(pos);
    int mid=tree[pos].mid();
    if(r<=mid)
        update(l,r,x,pos<<1);
    else if(l>mid)
        update(l,r,x,pos<<1|1);
    else
    {
        update(l,mid,x,pos<<1);
        update(mid+1,r,x,pos<<1|1);
    }
    pushup(pos);
}
int main()
{
    int T;
    scanf("%d",&T);
    while(T--)
    {
        int n,m;
        scanf("%d%d",&n,&m);
        build(1,n,1);
        int i;
        for(i=0;i<m;i++)
        {
            int k,a,b;
            scanf("%d%d%d",&k,&a,&b);
            a++;
            if(k==2)
                b++;
            if(k==2)
            {
                int x=query(a,b,1);
                update(a,b,0,1);
                printf("%d\n",b-a+1-x);
            }
            else
            {
                int l=a,r=n;
                int x=query(l,r,1);
                //printf("asdf %d\n",x);
                if(x==0)
                {
                    printf("Can not put any one.\n");
                    continue;
                }
                int m1,m2;
                while(l<=r)
                {
                    int mid=(l+r)>>1;
                    x=query(a,mid,1);
                    if(x>0)
                    {
                        m1=mid;
                        r=mid-1;
                    }
                    else
                        l=mid+1;
                }
                l=a;r=n;
                x=query(l,r,1);
                m2=n;
                if(x<b)
                    b=x;
                while(l<=r)
                {
                    int mid=(l+r)>>1;
                    x=query(a,mid,1);
                    if(x>=b)
                    {
                        m2=mid;
                        r=mid-1;
                    }
                    else
                        l=mid+1;
                }

                update(m1,m2,1,1);
                printf("%d %d\n",m1-1,m2-1);
            }
        }
        printf("\n");
    }
    return 0;
}