Submission #675161

#	Time	Username	Problem	Language	Result	Execution time	Memory
675161		Tuanlinh123	Table Tennis (info1cup20_tabletennis)	C++17	100 / 100	198 ms	13800 KiB

tabletennis

#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define pll pair<ll,ll>
#define mp make_pair
#define pb push_back
#define fi first
#define se second

using namespace std;

#define LOCALIO "C:/Users/admin/Documents/Code/"

ll n, k, a[200005];
map <ll, ll> Map;

void Try(ll sum)
{
    if (Map[sum]==1)
        return;
    Map[sum]=1;
    ll l=1, r=n+k, num=0, cnt=0;
    vector <ll> ans;
    while (ans.size()<n && cnt<=k && r>l)
    {
        while (a[l]+a[r]>sum && r>l)
            r--, cnt++;
        if (a[l]+a[r]==sum) 
            ans.pb(a[l]), ans.pb(a[r]), r--;
        else cnt++;
        l++;
    }
    if (cnt>k || ans.size()<n)
        return;
    sort(ans.begin(), ans.end());
    for (ll i:ans) cout << i << " ";
    exit(0);
}

int main()
{
    #ifdef LOCAL
        freopen( LOCALIO "input.txt","r",stdin) ;
        freopen( LOCALIO "output.txt","w",stdout) ;
    #endif

    ios_base::sync_with_stdio(NULL); cin.tie(nullptr); cout.tie(nullptr);
//	freopen("FIBONACCI.inp","r",stdin);
//	freopen("FIBONACCI.out","w",stdout);
    cin >> n >> k;
    for (ll i=1; i<=n+k; i++)
        cin >> a[i];
    for (ll i=1; i<=k+1; i++)
        for (ll j=n; j<=n+k; j++)
            Try(a[i]+a[j]);
}

Compilation message (stderr)

tabletennis.cpp: In function 'void Try(long long int)':
tabletennis.cpp:24:22: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   24 |     while (ans.size()<n && cnt<=k && r>l)
      |            ~~~~~~~~~~^~
tabletennis.cpp:33:28: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   33 |     if (cnt>k || ans.size()<n)
      |                  ~~~~~~~~~~^~
tabletennis.cpp:22:20: warning: unused variable 'num' [-Wunused-variable]
   22 |     ll l=1, r=n+k, num=0, cnt=0;
      |                    ^~~

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