#include<bits/stdc++.h>
using namespace std;
const int N=5e5+4;
int n,q,l[N],ld[N],ans[N],b[N];bool a[N];
vector<int>s[N],t[N];
void ad(int i){for(;i;i-=i&-i)b[i]++;}
int qr(int i){int x=0;for(;i<=n;i+=i&-i)x+=b[i];return x;}
int main(){
    ios::sync_with_stdio(false),cin.tie(0);
    cin>>n>>q;for(int i=1;i<=n;i++)cin>>a[i];
    for(int i=1,c;i<=n;i++){
        cin>>c;if(!a[i])s[c].emplace_back(i);
        else if(!s[c].empty())ld[i]=s[c].back(),s[c].pop_back();
    }
    for(int i=1,r;i<=q;i++)cin>>l[i]>>r,t[r].emplace_back(i);
    for(int i=1;i<=n;i++){ad(ld[i]);for(auto&x:t[i])ans[x]=qr(l[x]);}
    for(int i=1;i<=q;i++)cout<<ans[i]<<'\n';
}
样例

answer.code:19:1: error: ‘样例’ does not name a type
   19 | 样例
      | ^~~~