Submission #1121568

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121568		vjudge1	Ice Hockey World Championship (CEOI15_bobek)	C++17	100 / 100	335 ms	20908 KiB

bobek

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ld double


const int INF = 1e18;
const int mod = 12345;
const int sz = 3e5 + 5;
const int usz = 1e6 + 5;

signed main()
{
   ios_base::sync_with_stdio(0);cin.tie(0);
   int n , m;
   cin >> n >> m;
   vector < int > a(n);
   for(int i = 0;i < n;i++) cin >> a[i];
   sort(a.begin() , a.end());
   vector < int > q1;
   vector < int > q2;
   for(int i = 0;i < n / 2 + (n & 1);i++) q1.push_back(a[i]);
   for(int i = n / 2 + (n & 1);i < n;i++) q2.push_back(a[i]);
   vector < int > pos1;
   vector < int > pos2;
   for(int bit = 0;bit <= pow(2 , q1.size()) - 1;bit++)
   {
     int sum = 0;
     for(int i = 0;i < q1.size();i++)
     {
       if((1 << i) & bit)
       {
         sum += q1[i];
       }
     }
     if(sum <= m) pos1.push_back(sum);
   }
   for(int bit = 0;bit <= pow(2 , q2.size()) - 1;bit++)
   {
     int sum = 0;
     for(int i = 0;i < q2.size();i++)
     {
       if((1 << i) & bit)
       {
         sum += q2[i];
       }
     }
     if(sum <= m) pos2.push_back(sum);
   }
   sort(pos1.begin() , pos1.end());
   sort(pos2.begin() , pos2.end());
   int ans = 0;
   for(int i = 0;i < pos1.size();i++)
   {
     int l = 0 , r = pos2.size() - 1 , best = -1;
     while(l <= r)
     {
         int mid = (l + r) >> 1;
         if(pos2[mid] + pos1[i] <= m)
         {
             best = max(best , mid + 1);
             l = mid + 1;
         }
         else r  = mid - 1;
     }
     ans += best;
   }
   cout << ans << endl;
}

Compilation message (stderr)

bobek.cpp: In function 'int main()':
bobek.cpp:30:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |      for(int i = 0;i < q1.size();i++)
      |                    ~~^~~~~~~~~~~
bobek.cpp:42:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |      for(int i = 0;i < q2.size();i++)
      |                    ~~^~~~~~~~~~~
bobek.cpp:54:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |    for(int i = 0;i < pos1.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