Submission #996760

#	Time	Username	Problem	Language	Result	Execution time	Memory
996760		faqinyeager	Self Study (JOI22_ho_t2)	C++17	100 / 100	208 ms	11520 KiB

Main

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

ll n, m;
vector<ll> a, b;

bool F(ll x){
    ll r = 0;
    for(int i = 0; i < n; i++){
        if(x <= a[i] * m) r += (x + a[i] - 1) / a[i];
        else r += m + (x - a[i] * m + b[i] - 1) / b[i];
        if(r > n * m) return 0;
    }
    return 1;
}

int main(){
    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];
    
    for(int i = 0; i < n; i++) a[i] = max(a[i], b[i]);
    
    ll lx = 0, rx = 1LL << 60;
    
    while(rx - lx > 1){
        ll mid = (rx + lx) / 2;
        if(F(mid)) lx = mid;
        else rx = mid;
    }
    
    cout << lx;
}

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