Submission #65778

#	Time	Username	Problem	Language	Result	Execution time	Memory
65778		Googal	Ice Hockey World Championship (CEOI15_bobek)	C++14	100 / 100	303 ms	21496 KiB

bobek

#include <algorithm>
#include <iostream>
#include <vector>

using namespace std;

typedef long long ll;

const int NMAX = 50;

int n;
ll v[NMAX];
ll m, res;

vector < ll > a1;
vector < ll > a2;

void solve(int pos, int lim, ll sum, vector < ll > &a) {
  if(pos == lim) {
    a.push_back(sum);
    return;
  }

  solve(pos + 1, lim, sum, a);
  solve(pos + 1, lim, sum + v[pos], a);
}

int main()
{
  ios::sync_with_stdio(false);

  cin >> n >> m;
  for(int i = 0; i < n; i++)
    cin >> v[i];

  solve(0, n / 2, 0, a1);
  sort(a1.begin(), a1.end());

  solve(n / 2, n, 0, a2);
  sort(a2.begin(), a2.end());

  int val = a2.size() - 1;

  for(int i = 0; i < a1.size(); ++i) {
    if(m < a1[i])
      break;
    while(a2[val] > m - a1[i] && 0 <= val)
      val--;

    res += val;
    res++;
  }

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

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:44:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < a1.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