Submission #1291097

#	Time	Username	Problem	Language	Result	Execution time	Memory
1291097		lmaobruh	Roses (BOI20_roses)	C++20	20 / 100	85 ms	584 KiB

Roses

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define eb emplace_back
#define pb push_back
#define fi first
#define se second
#define ii pair<int,int>
#define ve vector
#define all(x) x.begin(), x.end()
#define fo(i,a,b) for (int i=(a); i<=(b); ++i)
#define fd(i,a,b) for (int i=(a); i>=(b); --i)
#define maxi(a, b) a = max(a, b)
#define mini(a, b) a = min(a, b)
#define _ << ' ' <<

const int N = 2e7+5, inf = 1e9+10, mod = 1e9+7;
const ll inf64=1e18+1;

/**

**/

ll n, a, b, c, d;

inline ll calc(ll x, ll num, ll cost) {
    ll tt = (x + num - 1) / num;
    if (tt>=inf64/cost||cost*tt>=inf64) return inf64;
    return cost*tt;
}

void sol() {
    cin >> n >> a >> b >> c >> d;
    if (1ll * b * c >= 1ll * a * d) swap(a, c), swap(b, d);
    ll ans = inf;
    fo(i,0,min(n,(ll)1e8)) {
        mini(ans, 1ll * i * d + calc(n - 1ll * i * c, a, b));
        if (1ll * i * c > n) break;
    }
    cout<<ans;
}

signed main(){
    ios::sync_with_stdio(0); cin.tie(0);
    if(fopen("A.inp","r")) {
        freopen("A.inp","r",stdin);
        freopen("A.out","w",stdout);
    }
    int tc = 1; // cin >> tc;
    fo(i,1,tc) sol();
    return 0;
}

Compilation message (stderr)

Roses.cpp: In function 'int main()':
Roses.cpp:46:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         freopen("A.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~
Roses.cpp:47:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         freopen("A.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~

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