Submission #216132

#	Time	Username	Problem	Language	Result	Execution time	Memory
216132		MKopchev	Kitchen (BOI19_kitchen)	C++14	100 / 100	17 ms	768 KiB

kitchen

#include<bits/stdc++.h>
using namespace std;
const int nmax=3e2+42,inf=1e9;

void no()
{
    printf("Impossible");
    exit(0);
}

int take_min(int a,int b)
{
    if(a==-1)return b;
    return min(a,b);
}
int filled[nmax*nmax];

int n,m,k;

int main()
{
    scanf("%i%i%i",&n,&m,&k);

    int sum=0,dish;
    for(int i=1;i<=n;i++)
    {
        scanf("%i",&dish);
        if(dish<k)no();
        sum=sum+dish;
    }

    for(int i=1;i<nmax*nmax;i++)filled[i]=-inf;

    int chef,ret=-1,total=0;
    for(int i=1;i<=m;i++)
    {
        scanf("%i",&chef);
        total=total+chef;

        for(int bought=total;bought>=chef;bought--)
        {
            int can_buy=min(n,chef);
            filled[bought]=max(filled[bought],filled[bought-chef]+can_buy);
        }

        //for(int bought=0;bought<=total;bought++)cout<<filled[bought]<<" ";cout<<endl;
    }

    if(total<sum)no();

    //cout<<"sum= "<<sum<<endl;

    for(int i=sum;i<=total;i++)
        if(filled[i]>=k*n)ret=take_min(ret,i-sum);

    if(ret==-1)no();
    printf("%i\n",ret);
    return 0;
}

Compilation message (stderr)

kitchen.cpp: In function 'int main()':
kitchen.cpp:22:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i%i%i",&n,&m,&k);
     ~~~~~^~~~~~~~~~~~~~~~~~~
kitchen.cpp:27:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i",&dish);
         ~~~~~^~~~~~~~~~~~
kitchen.cpp:37:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%i",&chef);
         ~~~~~^~~~~~~~~~~~

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