Submission #702997

#	Time	Username	Problem	Language	Result	Execution time	Memory
702997		stevancv	Self Study (JOI22_ho_t2)	C++14	100 / 100	632 ms	11404 KiB

Main

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 2e5 + 2;
const int inf = 2e9;
ll C(ll a, ll b) {
    if (a <= 0) return 0;
    return (a + b - 1) / b;
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    ll n, m;
    cin >> n >> m;
    vector<ll> 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 Can = [&] (ll x) {
        ll kol = 0;
        for (int i = 0; i < n; i++) {
            ll p = C(x, b[i]);
            ll o = min(C(x, a[i]), m);
            ll q = o + C(x - o * a[i], b[i]);
            kol += min(p, q);
            if (kol > n * m) return 0;
        }
        if (kol <= n * m) return 1;
        return 0;
    };
    ll l = 1, r = 1e18, ans = 0;
    while (l <= r) {
        ll mid = l + r >> 1;
        if (Can(mid)) {
            l = mid + 1;
            ans = mid;
        }
        else r = mid - 1;
    }
    cout << ans << en;
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:38:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   38 |         ll mid = l + r >> 1;
      |                  ~~^~~

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