제출 #534184

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
534184		Paul_Liao_1457	Self Study (JOI22_ho_t2)	C++17	0 / 100	418 ms	5120 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 long long
#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)(2e18)
#define pb push_back
#define F first
#define S second

using namespace std;

ll n,M;
ll A[300005],B[300005];


bool check(ll x,ll m){
    ll res=0;
    FOR(i,0,n){
        ll tmp=x;
        if(1ll*A[i]*m<tmp){
            tmp-=A[i]*m;
            if(B[i]<=0) exit(-1);
            res-=tmp/B[i]+(tmp%B[i]?1:0);
        }
        else{
            ll used=1;
            res+=m-used;
        }
    }
    if(res>=0) return 1;
    return 0;
}

signed main(){
    cin>>n>>M;
    FOR(i,0,n){
        cin>>A[i];
    }
    FOR(i,0,n){
        cin>>B[i]; A[i]=max(A[i],B[i]);
    }
    ll l=1,r=(1e18+1),ans=1;
    while(l<r){
        ll mid=(l+r)>>1;
        if(check(mid,1)){
            ans=max(ans,mid); l=mid+1;
        }
        else{
            r=mid;
        }
    }
    cout<<ans<<endl;
}

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