Submission #758571

#	Time	Username	Problem	Language	Result	Execution time	Memory
758571		Charizard2021	Self Study (JOI22_ho_t2)	C++17	100 / 100	391 ms	10776 KiB

Main

#include<bits/stdc++.h>
using namespace std;
bool works(long long mid, vector<long long>& a, vector<long long>& b, long long n, long long m){
    long long days = 0;
    for(long long i = 0; i < n; i++){
        if(mid <= a[i] * m){
            days += (mid + a[i] - 1) / a[i];
        }
        else{
            days += m + (mid - a[i] * m + b[i] - 1) / b[i];
        }
        if(days > n * m){
            return false;
        }
    }
    return true;
}
int main(){
    long long n, m;
    cin >> n >> m;
    vector<long long> a(n);
    for(long long i = 0; i < n; i++){
        cin >> a[i];
    }
    vector<long long> b(n);
    for(long long i = 0; i < n; i++){
        cin >> b[i];
    }
    for(long long i = 0; i < n; i++){
        a[i] = max(a[i], b[i]);
    }
    long long low = 0;
    long long high = 1LL << 60;
    while(high - low > 1){
        long long mid = (low + high)/2;
        if(works(mid, a, b, n, m)){
            low = mid;
        }
        else{
            high = mid;
        }
    }
    cout << low << "\n";
}

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