Submission #1291087

#	Time	Username	Problem	Language	Result	Execution time	Memory
1291087		lmaobruh	Roses (BOI20_roses)	C++20	0 / 100	39 ms	78676 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 = 1e7+5, inf = 1e9+10, mod = 1e9+7;

/**

**/

ll n, a, b, c, d, f[N];

ll cal(ll x) {
    return min((x+a-1)/a*b, (x+c-1)/c*d);
}

void sol() {
    cin >> n >> a >> b >> c >> d;
    memset(f,0x3f,sizeof(f));
    f[0]=0;
    ll ans=1e18;
    fo(i,1,N-5) {
        if (i>n) break;
        if (i>=a) mini(f[i],f[i-a]+b);
        if (i>=c) mini(f[i],f[i-c]+d);
        if (f[i]<1e18) mini(ans,f[i]+cal(n-i));
    }
    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: 0 / 20
• Subtask 2: 0 / 80