Submission #658840

#	Time	Username	Problem	Language	Result	Execution time	Memory
658840		GrandTiger1729	Self Study (JOI22_ho_t2)	C++17	100 / 100	249 ms	11452 KiB

Main

#include <iostream>
using namespace std;

const long long INF = 5e18;
int main(){
    cin.tie(0)->sync_with_stdio(0);
    long long n, m; cin >> n >> m;
    long long a[n], b[n];
    for (int i = 0; i < n; i++){
        cin >> a[i];
    }
    for (int i = 0; i < n; i++){
        cin >> b[i];
    }
    auto check = [&](long long x) -> bool {
        long long cnt = 0;
        for (int i = 0; i < n; i++){
            if (a[i] > b[i]){
                if (a[i] * m >= x){
                    cnt += x / a[i] + (bool)(x % a[i]);
                }else{
                    cnt += m;
                    long long y = x - m * a[i];
                    cnt += y / b[i] + (bool)(y % b[i]);
                }
            }else{
                cnt += x / b[i] + (bool)(x % b[i]);
            }
            if (cnt > n * m){
                return false;
            }
        }
        return true;
    };
    long long l = 0, r = INF;
    while (l < r - 1){
        long long mid = (l + r) / 2;
        if (check(mid)){
            l = mid;
        }else{
            r = mid;
        }
    }
    cout << l;
    return 0;
}

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