Submission #794463

#	Time	Username	Problem	Language	Result	Execution time	Memory
794463		1bin	Self Study (JOI22_ho_t2)	C++14	100 / 100	235 ms	11448 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define all(v) v.begin(), v.end()
typedef long long ll;
const int NMAX = 3e5 + 5;
ll n, m, a[NMAX], b[NMAX];

int f(ll k){
    ll p = 0;
    for(int i = 0; i < n; i++){
        ll x = (k - 1) / a[i] + 1;
        if(x <= m) p += m - x;
        else p -= (k - a[i] * m - 1) / b[i] + 1;
        if(p < -1e18) return 0;
    }
    return p >= 0;
}

int main(void){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n >> m;
    for(int i = 0; i < n; i++) cin >> a[i];
    for(int i = 0; i < n; i++) cin >> b[i], a[i] = max(a[i], b[i]);
    ll l = 1, r = 1e18, mid;
    while(l < r){
        mid = (l + r + 1) / 2;
        if(f(mid)) l = mid;
        else r = mid - 1;
    }
    cout << l;
    return 0;
}

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