40tps求助

#include<bits/stdc++.h>
using namespace std;
long long n,a[100001],t[100001],k[100001],x[100001],ans=0,head=1;
int main(){
	cin>>n;
	for(long long i=1;i<=n;i++){
		cin>>t[i]>>k[i];
		for(long long j=1;j<=k[i];j++){
			cin>>x[j];
			a[x[j]]++;
			if(a[x[j]]==1) ans++;
		}
			while(true) {
				if(t[i]-86400>=t[head]){
					for(long long w=1;w<=k[head];w++){
						a[x[w]]--;
						if(a[x[w]]==0) ans--;
					}
					head += 1;
				} else break;
			}
			cout<<ans<<"\n";
	}
	return 0;
}