Submission #851914

#	Time	Username	Problem	Language	Result	Execution time	Memory
851914		kderylo	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	296 ms	22908 KiB

bobek

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
long long tab[50];
vector<long long>w;
vector<long long>w2;
void calculate_values(int start,int ile,int id)
{
    for(int i=0;i<(1<<ile);i++){
        long long suma=0;
        for(int j=0;j<ile;j++){
            if((i&(1<<j))>0){
                suma+=tab[start+j];
            }
        }
        if(id==1){
            w.push_back(suma);
        }
        else{
            w2.push_back(suma);
        }
    }
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int ile;
    long long limit;
    cin>>ile>>limit;
    for(int i=0;i<ile;i++){
        cin>>tab[i];
    }
    if(ile==1){
        if(tab[0]<=limit){
            cout<<"2";
        }
        else{
            cout<<"1";
        }
        return 0;
    }
    calculate_values(0,ile/2,1);
    calculate_values(ile/2,ile-(ile/2),2);
    sort(w.begin(),w.end());
    sort(w2.begin(),w2.end());
    long long war=0;
    long long index=-1;
    for(int i=(int)w.size()-1;i>=0;i--){
        while(index+1<(int)w2.size()&&w2[index+1]+w[i]<=limit){
            index++;
        }
        war+=(index+1);
    }
    cout<<war;

    return 0;
}

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