Tanssiaiset

input/code.cpp: In function 'int main()':
input/code.cpp:19:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(unsigned long long i = 0; i < n/2 + 1; i++)
                                     ^
input/code.cpp:30:28: warning: converting to non-pointer type 'long long unsigned int' from NULL [-Wconversion-null]
     unsigned long long s = NULL;
                            ^
input/code.cpp:38:28: warning: converting to non-pointer type 'long long unsigned int' from NULL [-Wconversion-null]
     unsigned long long r = NULL, r2 = NULL;
                            ^
input/code.cpp:38:39: warning: converting to non-pointer type 'long long unsigned int' from NULL [-Wconversion-null]
     unsigned long long r = NULL, r2 = NULL;
                                       ^
input/code.cpp:39:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(unsigned long long i = 0; i < n/2 + 1; i++){...

#include <iostream>
#include <cmath>
#include <iomanip>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
    int n;

    cin >> n;

    vector<unsigned long long> inputs;
    vector<unsigned long long> lInputsSort;

    for(unsigned long long i = 0; i < n/2 + 1; i++)
    {
        unsigned long long a = 0;
        cin >> a;
        inputs.push_back(a);
        lInputsSort.push_back(a);
        cin >> a;
        inputs.push_back(a);
    }

    sort(lInputsSort.begin(), lInputsSort.end());
    unsigned long long s = NULL;
    for(unsigned long long i = 0; i < lInputsSort.size(); i++){
        if(lInputsSort[i] == s){
            break;
        }
        s = lInputsSort[i];
    }

    unsigned long long r = NULL, r2 = NULL;
    for(unsigned long long i = 0; i < n/2 + 1; i++){
        if(inputs[i * 2] == s){
            if(r == NULL){
                r = inputs[i * 2 + 1];
            }else{
                r2 = inputs[i * 2 + 1];
            }
        }
    }
    bool done = false;
    for(unsigned long long i = 0; i < n/2 + 1; i++){
        if(inputs[i * 2] == r){
            cout << s << " " << r;
            done = true;
            break;
        }
    }
    if(!done){
        cout << s << " " << r2;
    }

    unsigned long long w = 0;
    cin >> w;

    return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: WRONG ANSWER

Test 3

Group: 1

Verdict: WRONG ANSWER

Test 4

Group: 1

Verdict: WRONG ANSWER

Test 5

Group: 1

Verdict: WRONG ANSWER

Test 6

Group: 2

Verdict: WRONG ANSWER

Test 7

Group: 2

Verdict: WRONG ANSWER

Test 8

Group: 2

Verdict: WRONG ANSWER

Test 9

Group: 2

Verdict: WRONG ANSWER

Test 10

Group: 2

Verdict: WRONG ANSWER