Submission #534284

#	Time	Username	Problem	Language	Result	Execution time	Memory
534284		Paul_Liao_1457	Self Study (JOI22_ho_t2)	C++14	100 / 100	294 ms	20480 KiB

Main

// 還要更強
#include<iostream>
#include<queue>
#include<set>
#include<map>
#include<iomanip>
#include<math.h>
#include<cstring>
#include<stack>
#include<string.h>
#include<random>
#include<algorithm>
#include<vector>
#include <cassert>

#define ll __int128_t
#define FOR(i,a,b) for(ll i=a;i<b;i++)
#define REP(i,a,b) for(int i=a;i>=b;i--)
#define INF (ll)(1e9)
#define pb push_back
#define F first
#define S second
#define AC ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define endl "\n"

using namespace std;

long long n,m;
ll aaa[300005],bbb[300005];
long long a[300005],b[300005];



signed main(){
    AC;
    cin>>n>>m;
    FOR(i,1,n+1){
        cin>>a[i]; aaa[i]=a[i];
    }
    FOR(i,1,n+1){
        cin>>b[i]; bbb[i]=b[i]; aaa[i]=max(a[i],b[i]);
    }
    ll l=0,r=(3e18+1),ans=0;
    while(l<r){
        ll mid=(l+r)/2,tot=0;
        FOR(i,1,n+1){
            if(aaa[i]*m<mid){
                ll tmp=mid-aaa[i]*m;
                tot+=(tmp-1)/bbb[i]+1;
            }
            else{
                ll used=(mid-1)/aaa[i]+1;
                tot-=m-used;
                //cerr<<"m="<<m<<endl;
            }
            //cout<<"m="<<m<<endl;
        }
        //cout<<"mid="<<mid<<" tot="<<tot<<endl;
        if(tot<=0){
            ans=max(ans,mid);
            l=mid+1;
        }
        else{
            r=mid;
        }
    }
    cout<<(long long)ans<<endl;
}

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29
• Subtask 5: 9 / 9