Submission #526684

#	Time	Username	Problem	Language	Result	Execution time	Memory
526684		couplefire	Self Study (JOI22_ho_t2)	C++17	100 / 100	250 ms	9640 KiB

Main

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

int main(){
    // freopen("a.in", "r", stdin);
    cin.tie(0)->sync_with_stdio(0);
    int n, m; cin >> n >> m;
    vector<ll> a(n), b(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 lo = 0, hi = 1e18;
    while(lo<hi){
        ll mid = lo+(hi-lo+1)/2;
        ll cnt = 0;
        for(int i = 0; i<n; ++i){
            if(a[i]*m>=mid) cnt += m-(mid+a[i]-1)/a[i];
            else cnt -= (mid-a[i]*m+b[i]-1)/b[i];
            if(cnt<-1ll*n*m) break;
        }
        if(cnt>=0ll) lo = mid;
        else hi = mid-1; 
    }
    cout << lo << '\n';
}

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