제출 #1130424

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1130424		AksLolCoding	Let's Win the Election (JOI22_ho_t3)	C++17	0 / 100	1 ms	324 KiB

Main

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

ll cdiv(ll a, ll b){
    return (a + b - 1) / b;
}

int main(){
    cin.tie(0)->sync_with_stdio(0);
    ll n, m;
    cin >> n >> m;
    vector<ll> a(n), b(n);
    for(auto& i: a) cin >> i;
    for(auto& i: b) cin >> i;
    for(int i = 0; i < n; i++) a[i] = max(a[i], b[i]);

    // solve
    auto check = [&](ll x) {
        ll days = 0;
        for (int i = 0; i < n; i++){
            if(x <= a[i] * m) days += cdiv(x, a[i]);
            else days += m + cdiv(x - a[i] * m, b[i]);
            if(days > n * m) return false;
        }
        return true;
    };

    ll l = 0, r = 1LL << 60;
    while(r - l > 1){
        ll mid = (r + l) / 2;
        if (check(mid)) l = mid;
        else r = mid;
    }

    // ans
    cout << l << '\n';
}

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