Reinitialize Object In-Place

#include <iostream>
#include <cstdint>
#include <new>

using namespace std;

struct Mode 
{
    int level;
};

// Write your struct and placement new logic here

int main() {
    int firstLevel, secondLevel;
    cin >> firstLevel >> secondLevel;

    // Write your in-place reinitialization logic here

    alignas(Mode) std::byte buffer[sizeof(Mode)];
    
    Mode* mode = new (buffer) Mode{firstLevel};
    mode->~Mode();

    mode = new (buffer) Mode{secondLevel};
    mode->~Mode();

    cout << mode->level;

    return 0;
}

Solving Approach