Submission #858960

#	Time	Username	Problem	Language	Result	Execution time	Memory
858960		Tenis0206	Ice Hockey World Championship (CEOI15_bobek)	C++11	100 / 100	294 ms	21940 KiB

bobek

#include <bits/stdc++.h>

using namespace std;

const int nmax = 40;

int n;
long long m;
long long v[nmax + 5];

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin>>n>>m;
    for(int i=1;i<=n;i++)
    {
        cin>>v[i];
    }
    int sz_a = n / 2;
    int sz_b = n - sz_a;
    vector<long long> a,b;
    for(int mask=0;mask<(1<<sz_a);mask++)
    {
        long long sum = 0;
        for(int b=0;b<sz_a;b++)
        {
            if((mask & (1<<b))!=0)
            {
                sum += v[b + 1];
            }
        }
        a.push_back(sum);
    }
    for(int mask=0;mask<(1<<sz_b);mask++)
    {
        long long sum = 0;
        for(int b=0;b<sz_b;b++)
        {
            if((mask & (1<<b))!=0)
            {
                sum += v[sz_a + b + 1];
            }
        }
        b.push_back(sum);
    }
    sort(a.begin(),a.end());
    sort(b.begin(),b.end());
    int poz = b.size() - 1;
    long long rez = 0;
    for(int i=0;i<a.size();i++)
    {
        while(poz >= 0 && a[i] + b[poz] > m)
        {
            --poz;
        }
        rez += poz + 1;
    }
    cout<<rez<<'\n';
    return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:51:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |     for(int i=0;i<a.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