ABC243G Sqrt

Posted 2022-03-19 solemntee

#include<bits/stdc++.h>
#define ll long long
using namespace std;
unsigned ll a[100005];
unsigned ll Sqrt(unsigned ll x)

	unsigned ll l=1,r=5e9;
	while(l<r)
	
		unsigned ll mid=(l+r+1)>>1;
		if(mid*mid<=x)l=mid;
		else r=mid-1;
	
	return l;

int main()

	a[1]=1;
	for(int i=2;i<=100000;i++)a[i]=a[i-1]+a[Sqrt(i)];
	struct edge
	
		unsigned ll l,r;
		unsigned ll val;
	;
	vector<edge>v;
	for(int i=1;i<=100000;i++)v.push_back(1LL*i*i,1LL*(i+1)*(i+1)-1,a[i]);

	int t;
	scanf("%d",&t);
	while(t--)
	
		unsigned ll x;
		cin>>x;
		if(Sqrt(x)<=100000)cout<<a[Sqrt(x)]<<endl;
		else 
		
			unsigned ll ans=a[100000];
			unsigned ll mark=Sqrt(x);
			unsigned ll L=1e5+1,R=mark;
			auto f=[&](unsigned ll l,unsigned ll r,unsigned ll L,unsigned ll R)->unsigned ll
			
				if(r<L||l>R)return 0;
				if(L>=l&&r>=R)return R-L+1;
				if(l>=L&&R>=r)return r-l+1;
				if(L>=l&&r>=L&&R>=r)return r-L+1;
				if(l>=L&&R>=l&&r>=R)return R-l+1;
			;
			for(auto [l,r,val]:v)
			
				ans+=val*f(l,r,L,R);
			
			cout<<ans<<endl;
		
	
    return  0;