Submission #656986

#	Time	Username	Problem	Language	Result	Execution time	Memory
656986		Darren0724	Self Study (JOI22_ho_t2)	C++17	100 / 100	356 ms	11544 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
int limit=5e15;
int n,m;
vector<int> a,b;
bool f(int k){
    int cnt=0;
    int need=0;
    for(int i=0;i<n;i++){
        int t=(k-1)/a[i]+1;
        if(t<=m){
            cnt+=m-t;
        }
        else{
            need+=(k-a[i]*m-1)/b[i]+1;
            if(need>limit){
                return 0;
            }
        }
    }
    return need<=cnt;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>m;
    a.resize(n);
    b.resize(n);
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    for(int i=0;i<n;i++){
        cin>>b[i];
        a[i]=max(a[i],b[i]);
    }
    int l=0,r=2e18;
    while(r-l>1){
        int m=(l+r)>>1;
        if(f(m)){
            l=m;
        }
        else{
            r=m;
        }
    }
    cout<<l<<endl;


    return 0;
}

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