bzoj2223: [Coci 2009]PATULJCI

#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cmath>
#include<cstdlib>
#include<ctime>
#include<algorithm>
using namespace std;
#define mid ((l+r)>>1)
#define LL long long
#define FILE "dealing"
#define up(i,j,n) for(LL i=(j);i<=(n);i++)
#define pii pair<int,int>
char buf[1<<15],*fs,*ft;
int gc(){return (fs==ft)&&(ft=((fs=buf)+fread(buf,1,1<<15,stdin)),fs==ft)?-1:*fs++;}
int read(){
int x=0,f=1,ch=gc();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=gc();}
while(ch>='0'&&ch<='9')x=(x<<1)+(x<<3)+ch-'0',ch=gc();
return f*x;
}
const int maxn=303000,inf=100000000,mod=998244353;
int n,m,lim;
int t[maxn];
namespace tree{
const int maxn=303000<<4;
int c[maxn][2],cnt=0,d,rt[maxn],sum[maxn],l,r,key;
inline void updata(int o){sum[o]=sum[c[o][0]]+sum[c[o][1]];}
void insert(int pre,int& o){
if(!o)o=++cnt;
if(l==r){sum[o]=sum[pre]+1;return;}
d=key>mid;
c[o][d^1]=c[pre][d^1];
if(d)l=mid+1;else r=mid;
insert(c[pre][d],c[o][d]);
updata(o);
}
void init(int* a){
up(i,1,n)
key=a[i],l=1,r=lim,insert(rt[i-1],rt[i]);
}
int query(int pre,int o){
if(l==r)return (sum[o]-sum[pre])>key?l:-1;
d=sum[c[o][0]]-sum[c[pre][0]];
if(d>key){r=mid;return query(c[pre][0],c[o][0]);}
else {l=mid+1;return query(c[pre][1],c[o][1]);}
}
int Query(int x,int y){
l=1,r=lim;key=(y-x+1)/2;
return query(rt[x-1],rt[y]);
}
};
int main(){
n=read(),lim=read();
up(i,1,n)t[i]=read();
tree::init(t);
m=read();
while(m--){
int x=read(),y=read();
int ans=tree::Query(x,y);
if(ans==-1)printf("no\n");
else printf("yes %d\n",ans);
}
return 0;
}