Submission #1186392

#	Time	Username	Problem	Language	Result	Execution time	Memory
1186392		Zbyszek99	Self Study (JOI22_ho_t2)	C++20	100 / 100	115 ms	5136 KiB

Main

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define ull unsigned long long
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<long long, long long>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define siz(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
//mt19937 mt;void random_start(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll los(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;

pll arr[300'001];
int n;
ll m;

bool check(ll mid)
{
    ll opers = 0;
    rep(i,n)
    {
        ll o = (mid + arr[i].ff-1)/arr[i].ff;
        if(o <= m)
        {
            opers += m-o;
        }
        else
        {
            ll zost = (mid - m*arr[i].ff+arr[i].ss-1)/arr[i].ss;
            if(zost <= opers)
            {
                opers -= zost;
            }
            else return 0;
        }
    }
    return 1;
}


int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    //random_start();
    cin >> n >> m;
    rep(i,n) cin >> arr[i].ff;
    rep(i,n) cin >> arr[i].ss;
    rep(i,n) arr[i].ff = max(arr[i].ff,arr[i].ss);
    sort(arr,arr+n);
    reverse(arr,arr+n);
    ll l = 0;
    ll r = 1e18;
    ll ans = 0;
    while(l <= r)
    {
        ll mid = (l+r)/2;
        if(check(mid))
        {
            ans = mid;
            l = mid+1;
        }
        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