Submission #395133

#	Time	Username	Problem	Language	Result	Execution time	Memory
395133		kaplanbar	Roses (BOI20_roses)	C++14	0 / 100	1 ms	204 KiB

Roses

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    ll n;
    ll a, b, c, d;
    cin >> n >> a >> b >> c >> d;

    ll lcm = (a * c) / __gcd(a, c);

    ll take = (n / lcm) * lcm;

    ll best = min((take / a) * b, (take / c) * d);

    n -= take;

    ll ans = 1e18;

    if(a >= c) {
        assert(n / a <= 1e7);

        for(int i = 0; i <= (n + a - 1) / a; i++) {
            ll other = max(0ll, n - i * a + c - 1) / c;
            ans = min(ans, i * b + other * d);
        }

    }
    else {
        assert(n / c <= 1e7);
    
        for(int i = 0; i <= (n + c - 1) / c; i++) {
            ll other = max(0ll, n - i * c + a - 1) / a;
            ans = min(ans, i * d + other * b);
        }
    }

    cout << ans + best;




    return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 80