思路
线段树维护区间空瓶的数量,然后每次放花二分位置得到左右端点的位置.
代码
#include<map>
#include<set>
#include<cmath>
#include<stack>
#include<queue>
#include<cstdio>
#include<string>
#include<vector>
#include<cstring>
#include<iomanip>
#include<sstream>
#include<iostream>
#include<algorithm>
#define INF 0x3f3f3f3f
#define ls l,m,rt<<1
#define rs m+1,r,rt<<1|1
#define ll __int64
//#define int ll
//typedef long long ll;
typedef unsigned long long ull;
const int MAXN=5e5+10;
const int MOD=1e9+7;
const double eps=1e-6;
using namespace std;
//-------------------------------------------//
int n,m;
int lazy[MAXN<<2],num[MAXN<<2];
void pushup(int rt)
{
num[rt]=num[rt<<1]+num[rt<<1|1];
}
void pushdown(int l,int r,int rt)
{
if(lazy[rt]==-1)return;
int len=r-l+1;
num[rt<<1]=(len-len/2)*lazy[rt];
num[rt<<1|1]=(len/2)*lazy[rt];
lazy[rt<<1]=lazy[rt<<1|1]=lazy[rt];
lazy[rt]=-1;
}
void build(int l,int r,int rt)
{
lazy[rt]=-1;
if(l==r)
{
num[rt]=1;
return;
}
int m=l+r>>1;
build(ls);
build(rs);
pushup(rt);
}
void updata(int op,int L,int R,int l,int r,int rt)
{
if(L<=l&&r<=R)
{
num[rt]=(r-l+1)*op;
lazy[rt]=op;
return;
}
pushdown(l,r,rt);
int m=l+r>>1;
if(L<=m)updata(op,L,R,ls);
if(m<R)updata(op,L,R,rs);
pushup(rt);
}
int query(int L,int R,int l,int r,int rt)
{
if(L<=l&&r<=R)
return num[rt];
pushdown(l,r,rt);
int m=l+r>>1,res=0;
if(L<=m)res+=query(L,R,ls);
if(m<R)res+=query(L,R,rs);
return res;
}
int binary(int x,int f)
{
int l=x,r=n,ans=0;
while(l<=r)
{
int m=l+r>>1;
if(query(x,m,1,n,1)>=f)
{
ans=m;
r=m-1;
}
else l=m+1;
}
return ans;
}
int main()
{
//ios::sync_with_stdio(false);
int t;
scanf("%d",&t);
while(t--)
{
scanf("%d%d",&n,&m);
build(1,n,1);
while(m--)
{
int op,a,b;
scanf("%d%d%d",&op,&a,&b);
if(op==1)
{
//cout<<query(a+1,8,1,n,1)<<endl;
int cnt=query(a+1,n,1,n,1);
if(!cnt)
{
printf("Can not put any one.\n");
continue;
}
int l=binary(a+1,1);
int r=binary(a+1,min(b,cnt));
updata(0,l,r,1,n,1);
printf("%d %d\n",l-1,r-1);
}
else
{
printf("%d\n",b-a+1-query(a+1,b+1,1,n,1));
updata(1,a+1,b+1,1,n,1);
}
}
printf("\n");
}
return 0;
}