Submission #845934

#	Time	Username	Problem	Language	Result	Execution time	Memory
845934		samekkk	Table Tennis (info1cup20_tabletennis)	C++14	100 / 100	188 ms	3288 KiB

tabletennis

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(a,b) for (int a = 0; a < (b); ++a)
#define pb push_back
#define all(t) t.begin(), t.end()

const int max_N = 160005;
int n = 0, k = 0;
int A[max_N];
vector<int> V;
vector<int> wyn;

inline bool czy_pasuje(int val1, int val2)
{
    if (val1 == val2) return false;
    wyn = vector<int>();
    wyn.pb(val1), wyn.pb(val2);
    if (n == 2) return true;
    int sum = val1 + val2, lewy_wsk = 0, prawy_wsk = n+k-1, ile_brak = 0;
    while(lewy_wsk < prawy_wsk)
    {
        if(A[lewy_wsk] == val1) ++lewy_wsk;
        if(A[prawy_wsk] == val2) --prawy_wsk;
        if (A[lewy_wsk] + A[prawy_wsk] == sum)
        {
            wyn.pb(A[lewy_wsk]), wyn.pb(A[prawy_wsk]);
            if (n == wyn.size()) return true;
            ++lewy_wsk, --prawy_wsk;
        }
        else if (A[lewy_wsk] + A[prawy_wsk] > sum)
        {
            --prawy_wsk, ++ile_brak;
        }
        else
        {
            ++lewy_wsk, ++ile_brak;
        }
        if (ile_brak > k) return false;
    }
    return false;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n >> k;
    rep(i,n+k) cin >> A[i];
    rep(i,k+1) V.pb(A[i]);
    for (int i = n-1; i < n+k; ++i) V.pb(A[i]);
    rep(i,V.size())
    {
        for (int j = i+1; j < V.size(); ++j)
        {
            if (czy_pasuje(V[i],V[j]) == true)
            {
                sort(all(wyn));
                for (auto v : wyn) cout << v << ' ';
                cout << '\n';
                return 0;
            }
        }
    }
    return 0;
}

Compilation message (stderr)

tabletennis.cpp: In function 'bool czy_pasuje(int, int)':
tabletennis.cpp:28:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |             if (n == wyn.size()) return true;
      |                 ~~^~~~~~~~~~~~~
tabletennis.cpp: In function 'int main()':
tabletennis.cpp:4:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define rep(a,b) for (int a = 0; a < (b); ++a)
      |                                    ^
tabletennis.cpp:54:5: note: in expansion of macro 'rep'
   54 |     rep(i,V.size())
      |     ^~~
tabletennis.cpp:56:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         for (int j = i+1; j < V.size(); ++j)
      |                           ~~^~~~~~~~~~

• 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