Submission #794408

#	Time	Username	Problem	Language	Result	Execution time	Memory
794408		Theo830	Self Study (JOI22_ho_t2)	C++17	100 / 100	279 ms	11512 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const ll INF = 1e9+7;
const ll MOD = 998244353;
typedef pair<ll,ll> ii;
#define iii pair<ll,ii>
#define f(i,a,b) for(ll i = a;i < b;i++)
#define pb push_back
#define vll vector<ll>
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
///I hope I will get uprating and don't make mistakes
///I will never stop programming
///sqrt(-1) Love C++
///Please don't hack me
///@TheofanisOrfanou Theo830
///Think different approaches (bs,dp,greedy,graphs,shortest paths,mst)
///Stay Calm
///Look for special cases
///Beware of overflow and array bounds
///Think the problem backwards
///Training
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    ll l = 0,r = 1e18;
    ll ans = 0;
    ll n,m;
    cin>>n>>m;
    ll a[n],b[n];
    f(i,0,n){
        cin>>a[i];
    }
    f(i,0,n){
        cin>>b[i];
    }
    while(l <= r){
        ll mid = (l+r)/2;
        ll A = 0,B = 0;
        f(i,0,n){
            if(b[i] >= a[i]){
                B += (mid + b[i] - 1) / b[i];
            }
            else{
                ll posa = min(m,(mid + a[i] - 1) / a[i]);
                A += posa;
                ll num = max(0LL,mid - posa * a[i]);
                B += (num + b[i] - 1) / b[i];
            }
            if(A + B > n * m){
                break;
            }
        }
        if(A + B <= n*m){
            l = mid + 1;
            ans = max(ans,mid);
        }
        else{
            r = mid - 1;
        }
    }
    cout<<ans<<"\n";
}

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