Submission #86815

#	Time	Username	Problem	Language	Result	Execution time	Memory
86815		igzi	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	449 ms	21296 KiB

bobek

#include <bits/stdc++.h>
#define maxN 41

using namespace std;

long long n,m,tmp,j,i,ans,a[maxN];
vector <long long> v,u;


int main()
{
    cin>>n>>m;
    for(i=0;i<n;i++) cin>>a[i];
    v.push_back(0);
    for(i=0;i<n/2;i++){
        tmp=v.size();
        for(j=0;j<tmp;j++){
            if(a[i]+v[j]>m) continue;
            v.push_back(a[i]+v[j]);
        }
    }
    u.push_back(0);
    for(i=n/2;i<n;i++){
        tmp=u.size();
        for(j=0;j<tmp;j++){
            if(a[i]+u[j]>m) continue;
            u.push_back(a[i]+u[j]);
        }
    }
    sort(u.begin(),u.end());
    for(i=0;i<v.size();i++){
        ans+=lower_bound(u.begin(),u.end(),m-v[i]+1)-u.begin();
    }
    cout<<ans<<endl;
    return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:31:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0;i<v.size();i++){
             ~^~~~~~~~~

• 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