Submission #534223

#	Time	Username	Problem	Language	Result	Execution time	Memory
534223		LittleOrange	Self Study (JOI22_ho_t2)	C++17	100 / 100	250 ms	6876 KiB

Main

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n,m;
vector<ll> a,b;
bool isok(ll target){ // ans>=target;
    ll time = 0;
    for (ll i = 0;i<n;i++){
        ll x = m;
        ll t = target - x*a[i];
        if (t<=-a[i]){
            x -= (-t)/a[i];
            t = target - x*a[i];
        }else if (t>0){
            x += t/b[i];
            t -= (t/b[i])*b[i];
            while (t>0){
                x++;
                t-=b[i];
            }
        }
        time += x;
        if (time>n*m) return false;
    }
    return true;
}
ll check(ll l, ll r){
    if (l >= r) return l;
    ll mid = (l+r)/2;
    if (isok(mid+1)){
        return check(mid+1,r);
    }else{
        return check(l,mid);
    }
}
int main(){
    ios::sync_with_stdio(0);cin.tie(0);
    cin >> n >> m;
    a.resize(n,0);
    b.resize(n,0);
    for (ll i = 0;i<n;i++){
        cin >> a[i];
    }
    for (ll i = 0;i<n;i++){
        cin >> b[i];
        a[i] = max(a[i], b[i]);
    }
    cout << check(0,5e18) << "\n";
}

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