Submission #85972

#	Time	Username	Problem	Language	Result	Execution time	Memory
85972		Nordway	Ice Hockey World Championship (CEOI15_bobek)	C++14	20 / 100	624 ms	17220 KiB

bobek

#include<bits/stdc++.h>
using namespace std;
long long int n,m,i,j,a[42],mid,sum,ans;
vector <long long int> v;
int main()
{
 cin>>n>>m;
 for(i=0;i<n;i++)
 {
  cin>>a[i];
 }
 mid=n/2+1;
 for(i=0;i<(1<<mid);i++)
 {
  for(j=0;j<mid;j++)
  {
   if((i>>j)&1)
   {
    sum+=a[j];
   }
  }
  v.push_back(sum);
  sum=0;
 }
 int fn=mid;
 mid=n-mid;
 sort(v.begin(),v.end());
 for(i=0;i<(1<<mid);i++)
 {
  for(j=0;j<mid;j++)
  {
   if((i>>j)&1)
   {
    sum+=a[j+fn];
   }
  }
  if(sum>m)continue;
  ans+=upper_bound(v.begin(),v.end(),m-sum)-v.begin();
  sum=0;
 }
 cout<<ans;
 return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10