Submission #494599

#	Time	Username	Problem	Language	Result	Execution time	Memory
494599		reni	Bootfall (IZhO17_bootfall)	C++14	28 / 100	52 ms	720 KiB

bootfall

#include<iostream>
#define endl '\n'
using namespace std;
long long a[10000000]={1}, b[10000];
bool used[1000000];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    long long m,s,n,i,j, last=0, br=30000;

    cin>>n;

    for(i=0;i<n;i++)
    {
        cin>>b[i];

        for(j=last;j>=0;j--)
        {
           if(a[j]) a[j+b[i]]+=a[j];
           last=max(last,j+b[i]);
        }
    }

    if(last%2 || !a[last/2]){cout<<0<<endl;return 0;}

    for(i=0;i<n;i++)
    {
        last-=b[i];
        for(j=0;j<=last;j++)
        {
             if(a[j])a[j+b[i]]-=a[j];
        }

        for(j=1;j<=30000;j++)
        {
            if(a[(j+last)/2]==0 || (j+last)%2==1)
            {
                if(!used[j])br--;used[j]=1;
            }
        }
        for(j=last;j>=0;j--)
        {
              if(a[j])  a[j+b[i]]+=a[j];

        }
        last+=b[i];
    }
    cout<<br<<endl;
    for(j=1;j<=30000;j++)
    {
        if(!used[j])cout<<j<<" ";
    }
    cout<<endl;


}

Compilation message (stderr)

bootfall.cpp: In function 'int main()':
bootfall.cpp:41:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   41 |                 if(!used[j])br--;used[j]=1;
      |                 ^~
bootfall.cpp:41:34: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   41 |                 if(!used[j])br--;used[j]=1;
      |                                  ^~~~
bootfall.cpp:12:15: warning: unused variable 'm' [-Wunused-variable]
   12 |     long long m,s,n,i,j, last=0, br=30000;
      |               ^
bootfall.cpp:12:17: warning: unused variable 's' [-Wunused-variable]
   12 |     long long m,s,n,i,j, last=0, br=30000;
      |                 ^

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 21
• Subtask 6: 0 / 35