제출 #1130422

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1130422		AksLolCoding	Self Study (JOI22_ho_t2)	C++17	62 / 100	128 ms	4936 KiB

Main

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

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

void solve() {
    int 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 = (l + r) / 2;
        if (check(mid)) l = mid;
        else r = mid;
    }

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

signed main() {
    cin.tie(0)->sync_with_stdio(0);
    solve();
}

• Subtask 1: 10 / 10
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 9