Submission #724798

#	Time	Username	Problem	Language	Result	Execution time	Memory
724798		Cookie	Self Study (JOI22_ho_t2)	C++14	100 / 100	255 ms	11468 KiB

Main

#include<bits/stdc++.h>
#include<fstream>
using namespace std;
ifstream fin("WINTER.inp");
ofstream fout("WINTER.out");
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
const ld PI = 3.14159265359;
const ll mod = 1e9 + 7;
const int mxn = 3e5 + 5, mxv = 1e6;
ll n, m;
ll a[mxn + 1], b[mxn + 1];
bool ck(ll mid){
    ll need = 0;
    forr(i, 0, n){
        ll have = max(a[i], b[i]) * m;
        ll val = mid / max(a[i], b[i]);
        if(mid % max(a[i], b[i]))val++;
        need += min(val, m);
        
        if(mid > have){
            need += ceil((ld)(mid - have) / (ld)(b[i]));
        }
        if(need > n * m)return(false);
    }
    
    return(need <= n * m);
}
signed main(){
    
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n >> m;
    forr(i, 0, n){
        cin >> a[i];
    }
    forr(i, 0, n)cin >> b[i];
    ll l = 1, r= 1e18, ans = 0;
    while(l <= r){
        ll mid = (l + r) >> 1;
        if(ck(mid)){
            ans = mid; l = mid + 1;
        }else{
            r = mid - 1;
        }
    }
    cout << ans;
    return(0);
}

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