задачи про спиннеры

#include <iostream>
using namespace std;
//задача 1
int main()
{
    int N, A, B, C;
    cin >> A >> B >> C;
    N = (C - A) / B;
    cout << N;
}

//задача 2
int main()
{
    int M,s3=0,s4=0;
    cin >> M;
    if (M == 0 || M == 1 || M == 2 || M == 5) {
        s3 = 0; s4 = 0;
    }
    else
    {
        while (M % 4 != 0) {
            s3++;
            M -= 3;
        }
        s4 = M / 4;
    }
    cout << s3 << endl << s4;
}

//задача 5
int main()
{
    int N,a,b,k;
    cin >> N>>k;
    a = N / pow(2, k);
    if (k%2!=0)
        b = N + 1 - a-pow(2,k);
    else
        b = N -2 - a - pow(2, k);
    if (a > b)
        cout << b << endl << a;
    else
        cout << a << endl << b;
}