Submission #366036

#	Time	Username	Problem	Language	Result	Execution time	Memory
366036		soba	Table Tennis (info1cup20_tabletennis)	C++14	0 / 100	234 ms	37852 KiB

tabletennis

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    ll n , k;
    cin >> n >> k ;
    ll teams=n/2;
    vector<ll>v;
    ll x , y ;
    n+=k;
    map<ll,ll>mp , occ;
    
    for(int i = 0 ; i < n ; i++)
    {
        cin >>  x;
        mp[x]++;
        v.push_back(x);
    }
    sort(v.begin(), v.end());
    vector<ll>poten;
    set<ll>ss;
    for(int i = 0 ; i< 2*k ; i++)
    {
        for( int j = n-1; j >= n-(2*k) ; j-- )
        {
           ss.insert(v[i]+v[j]);
            occ[v[i]+v[j]]++;
        }
    }
    ll ansss;
    ll tmp=teams;
    for(ll u : ss)
    {
        if(occ[u]==k)
            {
                ansss=u;
                break;
            }
    }
    vector<ll>ansa;
    ll cnt;
       for(int j = 0 ; j<n ; j++ )
        {
            if(mp[ansss-v[j]])
            {
                teams--;
                ansa.push_back(ansss-v[j]);
                ansa.push_back(v[j]);
            }
            if(teams==0)
                break;
        }
    sort( ansa.begin() , ansa.end());
    for(int i = 0 ; i < tmp*2 ; i++)
    {
        cout << ansa[i] <<  " " ;
    }
    return 0;
}

Compilation message (stderr)

tabletennis.cpp: In function 'int main()':
tabletennis.cpp:14:12: warning: unused variable 'y' [-Wunused-variable]
   14 |     ll x , y ;
      |            ^
tabletennis.cpp:46:8: warning: unused variable 'cnt' [-Wunused-variable]
   46 |     ll cnt;
      |        ^~~
tabletennis.cpp:49:24: warning: 'ansss' may be used uninitialized in this function [-Wmaybe-uninitialized]
   49 |             if(mp[ansss-v[j]])

• Subtask 1: 0 / 11
• Subtask 2: 0 / 9
• Subtask 3: 0 / 14
• Subtask 4: 0 / 15
• Subtask 5: 0 / 9
• Subtask 6: 0 / 14
• Subtask 7: 0 / 15
• Subtask 8: 0 / 13