Submission #53083

#	Time	Username	Problem	Language	Result	Execution time	Memory
53083		Alexa2001	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	413 ms	21504 KiB

bobek

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const int Nmax = 100;

ll a[Nmax], b[Nmax], ans = 0, sum, money;
vector<ll> A, B;
int i, j, n, m;

int main()
{
  //  freopen("input", "r", stdin);
  //  freopen("output", "w", stdout);
    cin.sync_with_stdio(false);

    cin >> n >> money;
    m = n>>1; n -= m;
    for(i=0; i<n; ++i) cin >> a[i];
    for(i=0; i<m; ++i) cin >> b[i];

    for(i=0; i<(1<<n); ++i)
    {
        sum = 0;
        for(j=0; j<n; ++j)
            if(i & (1<<j)) sum += a[j];
        A.push_back(sum);
    }

    for(i=0; i<(1<<m); ++i)
    {
        sum = 0;
        for(j=0; j<m; ++j)
            if(i & (1<<j)) sum += b[j];
        B.push_back(sum);
    }

    sort(A.begin(), A.end());
    reverse(A.begin(), A.end());
    sort(B.begin(), B.end());

    j = 0;
    for(i=0; i<A.size(); ++i)
    {
        while(j<B.size() && A[i] + B[j] <= money) ++j;
        ans += j;
    }

    cout << ans << '\n';
    return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:44:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=0; i<A.size(); ++i)
              ~^~~~~~~~~
bobek.cpp:46:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while(j<B.size() && A[i] + B[j] <= money) ++j;
               ~^~~~~~~~~

• 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