Submission #935090

#	Time	Username	Problem	Language	Result	Execution time	Memory
935090		ind1v	Ice Hockey World Championship (CEOI15_bobek)	C++11	100 / 100	417 ms	10548 KiB

bobek

#include <bits/stdc++.h>

using namespace std;

int n;
long long m;
vector<long long> c;
vector<long long> a, b;
vector<long long> c1;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cin >> n >> m;
  c.resize(n);
  for (int i = 0; i < n; i++) {
    cin >> c[i];
  }
  for (int i = 0; i < n / 2; i++) {
    a.emplace_back(c.back());
    c.pop_back();
  }
  while (!c.empty()) {
    b.emplace_back(c.back());
    c.pop_back();
  }
  for (int msk = 0; msk < (1 << a.size()); msk++) {
    long long s = 0;
    for (int i = 0; i < a.size(); i++) {
      if (msk >> i & 1) {
        s += a[i];
      }
    }
    c1.emplace_back(s);
  }
  sort(c1.begin(), c1.end());
  long long ans = 0;
  for (int msk = 0; msk < (1 << b.size()); msk++) {
    long long s = 0;
    for (int i = 0; i < b.size(); i++) {
      if (msk >> i & 1) {
        s += b[i];
      }
    }
    ans += (upper_bound(c1.begin(), c1.end(), m - s) - c1.begin());
  }
  cout << ans << '\n';
  return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:29:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for (int i = 0; i < a.size(); i++) {
      |                     ~~^~~~~~~~~~
bobek.cpp:40:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for (int i = 0; i < b.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