Airwrk coding problems

problem-three.cpp

#include <iostream>
#include <vector>

using namespace std;

int main() {
    vector<int> inputs{1, 1, 2, 3, 3, 3, 4, 4, 5, 6};
    auto arrSize = inputs.size();

    for (int i = 0; i < arrSize; i++) {
        if (inputs[i] == inputs[i+1]) {
            int inputValue = inputs[i+1];
            int swpValue = inputs[i+2];
            inputs[arrSize-1] = inputValue;
            inputs[i+1] = swpValue;
        }
    }
    
    for (int i = 0; i < arrSize; ++i) {
        cout << inputs[i] << "\n";
    }

    return 0;
}

problem-two.cpp

#include <iostream>
#include <vector>

using namespace std;

int main() {
    vector<int> inputs{3, 0, 1};
   // vector<int> inputs{0, 1}; PS, I am not able to find out the right implementation for this case.
    sort(inputs.begin(), inputs.end());

    for (int i = 1; i < inputs.size(); i++) {
        if(inputs[i] != i) {
            cout << i;
        }
    }

    return 0;
}