Kattis

来源：互联网发布：淘宝禁售手机充值了编辑：程序博客网时间：2024/05/22 06:34

题目链接点这里

裸莫队,,然而少加一个return..re2小时

#include<algorithm>#include<iostream>#include<cmath>#include<cstring>#include<cstdio>using namespace std;#define mem(x,y) memset(x,y,sizeof(x))#define FIN freopen("input.txt","r",stdin)#define fuck(x) cout<<x<<endlconst int MX=1000100;#define lson l,m,rt<<1#define rson m+1,r,rt<<1|1int n,m,k;int cnta[MX],cntb[MX],sum[MX];int a[MX],b[MX],block;struct Nod{int l,r,id,ans;bool operator < ( const Nod &a)const{if(l/block!=a.l/block) return l/block<a.l/block;else return r<a.r;}} p[MX];bool cmp(Nod a,Nod b){return a.id<b.id;}void del(int x,int &ans){if(cnta[a[x]]<=cntb[a[x]]) ans--;cnta[a[x]]--;if(cntb[b[x]]<=cnta[b[x]]) ans--;cntb[b[x]]--;}void add(int x,int &ans){if(cnta[a[x]]<cntb[a[x]]) ans++;cnta[a[x]]++;if(cntb[b[x]]<cnta[b[x]]) ans++;cntb[b[x]]++;}int main(){FIN;scanf("%d%d%d",&n,&m,&k);block=sqrt(n+0.5);for(int i=0; i<n; i++)scanf("%d",&a[i]);for(int i=0; i<n; i++)scanf("%d",&b[i]);for(int i=0; i<m; i++){scanf("%d%d",&p[i].l,&p[i].r);p[i].id=i;}sort(p,p+m);mem(cntb,0);mem(cnta,0);int l=0,r=0;cnta[a[l]]++;cntb[b[l]]++;int ans;if(a[l]==b[l]) ans=1;else ans=0;for(int i=0; i<m; i++){while(r>p[i].r)del(r--,ans);while(r<p[i].r) add(++r,ans);while(l<p[i].l) del(l++,ans);while(l>p[i].l) add(--l,ans);sum[p[i].id]=ans;}for(int i=0; i<m; i++) printf("%d\n",sum[i]);return 0;}

0 0