Submission #942660

#	Time	Username	Problem	Language	Result	Execution time	Memory
942660		damwuan	Kitchen (BOI19_kitchen)	C++14	100 / 100	27 ms	856 KiB

kitchen

#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define for1(i,j,k) for(int i=j;i<=k;i++)
#define for2(i,j,k) for(int i=j;i>=k;i--)
#define for3(i,j,k,l) for(int i=j;i<=k;i+=l)
#define bit(n,i) ((n>>i)&1)
#define all(x) x.begin(),x.end()
//#pragma GCC optimize("O2,unroll-loops")
//#pragma GCC target("avx,avx2,bmi,bmi2,sse,sse2,sse3,ssse3,sse4,popcnt")
//#define int long long
typedef long long ll;
typedef pair<int,int> pii;
typedef double db;
typedef pair<db,db> pdd;
typedef pair<ll,ll> pll;
const ll maxn=300*300;
const ll maxk=2e5+5;
const ll block_sz=317;
const ll inf=1e9;
const ll mod=111539786;

int n,m,k,a[maxn],b[maxn],sum;
int dp[300*300+1];
void sol()
{
    cin >> n>>m>>k;
    for1(i,1,n) cin >> a[i];
    for1(i,1,m) cin >> b[i];
    if (k>m)
    {
        cout << "Impossible";
        return;
    }

    for1(i,1,n)
    {
        if (a[i]< k)
        {
            cout << "Impossible";
            return;
        }
        sum+=(a[i]);
    }
//    return;
    for1(i,0,maxn) dp[i]=-inf;
    dp[0]=0;
    for1(i,1,m)
    {
        for2(j,maxn,0)
        {
            if (j-b[i]>=0) dp[j]=max(dp[j],dp[j-b[i]]+min(b[i],n));
        }
    }
    for1(i,sum,maxn)
    {
        if (dp[i] >= n*k)
        {
            cout << i-sum<<'\n';
            return;
        }
    }
    cout << "Impossible\n";

}

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
//    freopen("KITCHEN.inp","r",stdin);
//    freopen("KITCHEN.out","w",stdout);

    int t=1;//cin >> t;
    while (t--)
    {
        sol();
    }
}
/*

C[i-1][i+j-1]*C[sz[u]-i][sz[u]+sz[v]-i]
*/

• Subtask 1: 9 / 9
• Subtask 2: 22 / 22
• Subtask 3: 20 / 20
• Subtask 4: 21 / 21
• Subtask 5: 28 / 28