Submission #991175

#	Time	Username	Problem	Language	Result	Execution time	Memory
991175		Otalp	Self Study (JOI22_ho_t2)	C++14	100 / 100	261 ms	11556 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define int ll

ll a[300100];
ll b[300100];
ll n, m;


bool check(ll x){
    __int128 h = 0;
    //cout<<x<<' ';
    for(int i=1; i<=n; i++){
        if(a[i] > b[i]){
            if(m * a[i] < x){
                h += m;
                h += (x - m * a[i] - 1) / b[i] + 1;
            }
            else{
                h += (x - 1) / a[i] + 1;
            }
        }
        else{
            h += (x - 1) / b[i] + 1;
        }
    }
    //cout<<h<<'\n';
    return h <= m*n;
}


void solve(){
    cin>>n>>m;
    for(int i=1; i<=n; i++){
        cin>>a[i];
    }
    for(int i=1; i<=n; i++){
        cin>>b[i];
    }
    ll l=0, r=2e18;
    while(l < r){
        ll  mid=(l+r)/2;
        if(check(mid)) l = mid + 1;
        else r = mid;
    } 
    cout<<r - 1;
}


signed main(){
    solve();
}

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