Submission #534287

#	Time	Username	Problem	Language	Result	Execution time	Memory
534287		Paul_Liao_1457	Self Study (JOI22_ho_t2)	C++14	100 / 100	255 ms	5040 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>
 
#define ll long long
#define FOR(i,a,b) for(int 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
#define AC ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
 
using namespace std;
 
ll n,m;
ll a[300005],b[300005];
 
bool check(ll x){
    __int128_t res=0;
    FOR(i,0,n){
        ll tmp=x;
        if(a[i]*m<tmp){
            tmp-=a[i]*m;
            res-=(tmp-1)/b[i]+1;
        }
        else{
            ll used=(tmp-1)/a[i]+1;
            res+=m-used;
        }
    }
    if(res>=0) return 1;
    return 0;
}
 
signed main(){
    AC;
    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=0,r=(2e18+1),ans=0;
    while(l<r){
        ll mid=(l+r)>>1;
        if(check(mid)){
            ans=max(ans,mid); l=mid+1;
        }
        else{
            r=mid;
        }
    }
    cout<<ans<<endl;
}

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