Submission #1282290

#	Time	Username	Problem	Language	Result	Execution time	Memory
1282290		quan606303	Ice Hockey World Championship (CEOI15_bobek)	C++20	100 / 100	284 ms	20912 KiB

bobek

/*
 * @Author: RMQuan 
 * @Date: 2025-10-23 03:07:57 
 * @Last Modified by: RMQuan
 * @Last Modified time: 2025-10-23 03:20:09
 */
/*idea : 



*/
#include <bits/stdc++.h>
bool M1;
#define int long long
#define ll long long
#define INTMAX INT_MAX
#define INTMIN INT_MIN
#define LONGMAX LLONG_MAX
#define LONGMIN LLONG_MIN
#define fi first
#define se second
#define memfull(a,b) memset(a,b,sizeof(a));
#define endl '\n'
#define TASK "TEST"
#define file() if (fopen(TASK".inp","r")){freopen(TASK".inp","r",stdin); freopen(TASK".out","w",stdout);}
using namespace std;
const int MOD=1e9+7;
int n,m;
int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    file();
    cin>>n>>m;
    vector<int> a;
    for (int i=1;i<=n;i++)
    {
        int x;
        cin>>x;
        a.push_back(x);
    }
    vector<int> b1,b2;
    for (int i=0;i<n/2;i++)b1.push_back(a[i]);
    for (int i=n/2;i<n;i++)b2.push_back(a[i]);
    vector<int> mask1,mask2;
    for (int mask=1;mask<(1<<(b1.size()));mask++)
    {
        int sum=0;
        for (int i=0;i<b1.size();i++)
        {
            if (mask&(1<<i))sum+=b1[i];
        }
        if (sum<=m)
        {
            mask1.push_back(sum);
        }
    }
    for (int mask=1;mask<(1<<(b2.size()));mask++)
    {
        int sum=0;
        for (int i=0;i<b2.size();i++)
        {
            if (mask&(1<<i))sum+=b2[i];
        }
        if (sum<=m)mask2.push_back(sum);
    }
    sort(mask1.begin(),mask1.end(),greater<int>());
    sort(mask2.begin(),mask2.end());
    int ans=mask1.size()+mask2.size();
    for (int i=1,j=1;i<=mask1.size();i++)
    {
        while (j<=mask2.size()&&mask1[i-1]+mask2[j-1]<=m)j++;
        ans+=(j-1);
    }
    cout<<ans+1;
    bool M2;
    cerr<<"-------------------------------------------------"<<endl;
    cerr<<"Time : "<<clock()<<" ms"<<endl;
    cerr<<"Memory : "<<abs(&M2-&M1)/1024/1024<<" MB"<<endl;
    cerr<<"-------------------------------------------------"<<endl;
    return 0;
}

Compilation message (stderr)

bobek.cpp: In function 'int32_t main()':
bobek.cpp:25:50: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 | #define file() if (fopen(TASK".inp","r")){freopen(TASK".inp","r",stdin); freopen(TASK".out","w",stdout);}
      |                                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
bobek.cpp:34:5: note: in expansion of macro 'file'
   34 |     file();
      |     ^~~~
bobek.cpp:25:81: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 | #define file() if (fopen(TASK".inp","r")){freopen(TASK".inp","r",stdin); freopen(TASK".out","w",stdout);}
      |                                                                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bobek.cpp:34:5: note: in expansion of macro 'file'
   34 |     file();
      |     ^~~~

• 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