| ||||||||||
| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
借鉴HH大神的代码风格,不断TLE,求解#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
#define lchild l,m,rt<<1
#define rchild m+1,r,rt<<1|1
const int maxn=111111;
int cnt,col[maxn<<2];
bool hash[maxn];
void build(int l,int r,int rt);
void pusn_down(int rt);
void update(int L,int R,int c,int l,int r,int rt);
void query(int L,int R,int l,int r,int rt);
int main()
{
char op[10];
int a,b,c,n,m,T;
scanf("%d%d%d",&n,&T,&m);
memset(col,-1,sizeof(col));
build(1,n,1);
for(int i=0;i<m;i++)
{
scanf("%s%d%d",op,&a,&b);
if(a>b) swap(a,b);
if(op[0]=='C')
{
scanf("%d",&c);
update(a,b,c,1,n,1);
}
else
{
memset(hash,false,sizeof(hash));
cnt=0;
query(a,b,1,n,1);
printf("%d\n",cnt);
}
}
return 0;
}
void push_down(int rt)
{
if(col[rt]!=-1)
{
col[rt<<1]=col[rt<<1|1]=col[rt];
col[rt]=-1;
}
}
void build(int l,int r,int rt)
{
if(l==r)
{
col[rt]=1;
return ;
}
int m=(l+r)>>1;
build(lchild);
build(rchild);
}
void update(int L,int R,int c,int l,int r,int rt)
{
if(L<=l&&r<=R)
{
col[rt]=c;
return ;
}
push_down(rt);
int m=(l+r)>>1;
if(L<=m) update(L,R,c,lchild);
if(R>m) update(L,R,c,rchild);
}
void query(int L,int R,int l,int r,int rt)
{
if(col[rt]!=-1)
{
if(!hash[col[rt]]) cnt++;
hash[col[rt]]=true;
return ;
}
int m=(l+r)>>1;
if(L<=m) query(L,R,lchild);
if(R>m) query(L,R,rchild);
}
Followed by:
Post your reply here: |
All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator