To the unconscious self

Question B: fast power + Fast Multiplication

#include<bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
 
ll qu(ll a,ll b,ll p)
{
    ll ans=0;
    a%=p;
     
    while(b)
    {
        if(b%2) ans=(ans+a)%p;
         
        b>>=1;
        a=(a+a)%p;
    }
     
    return ans%p;
}
 
ll qui(ll a,ll b,ll p)
{
    ll ans=1;
    a%=p;
    while(b)
    {
        if(b%2==1) ans=qu(ans,a,p);
         
        b>>=1;
         
        a=qu(a,a,p);
    }
     
    return ans;
}
 
int main()
{
    ll n,a,b,p;
     
    cin>>n;
     
    while(n--)
    {
        cin>>a>>b>>p;
         
         
         
        cout<<qui(a,b,p)<<endl;
    }
     
    return 0;
}

Question E: two points (I have seen the questions, but I haven't finished them well)

#include<iostream>
#include<algorithm>

using namespace std;

typedef long long ll;

const ll maxn=100005;

ll L[maxn*2];

ll ans,n,k,sum;

void solve(ll l,ll r)
{
	if(l>=r) return ;
	
    ll t=(l+r)/2+1;
    sum=0;

    for(ll i=0;i<n;++i)
    {
        sum=sum+L[i]/t;
    }

    if(sum>=k)
    {
        ans=max(t,ans);
        solve(t,r);
    }
    else solve(l,t-1);
}

int main()
{
	ll i;

	cin>>n>>k;

	ll t=0;
	for(i=0;i<n;i++) cin>>L[i],t+=L[i];

	t/=k;
//	cout<<t<<endl;
	solve(0,t);

	cout<<ans<<endl;

	return 0;
}

Question J: Find function (not long ago, I used this find function. I didn't think about the amount of data carefully, but I thought of ac automata. ac automata is totally wrong. If any big guy wrote out a problem, please give me the address and give me a new look!!!)

#include<bits/stdc++.h>
 
using namespace std;
 
const int maxn=1000005;
 
string a,b;
 
int main()
{
    int n,i,j;
     
    cin>>a;
    cin>>n;
     
    while(n--)
    {
        cin>>b;
        string::iterator it1=b.begin(),it2=a.begin();
         
        bool f=1;
        while(it1<b.end()&&it2<a.end())
        {
            it2=find(it2,a.end(),*it1);
            it1++;
            it2++;
        }
         
        if(it1==b.end()&&it2<=a.end()) cout<<"Yes";
        else cout<<"No";
         
        cout<<"\n";
    }
     
    return 0;
}

Above.