#include <iostream>

using namespace std;

int min(int, int, int, int);

int
main()
{
    int a, b, c, d;
    int x;

    cout << "Please enter 4 numbers:" << endl;
    cin >> a >> b >> c >> d;

    x = min(a, b, c, d);

    cout << "The minimum is " << x << endl;

    return (0);
}

int
min(int a, int b, int c, int d)
{
    int min;

    min = a;

    if (b < min) {
	min = b;
    }

    if (c < min) {
	min = c;
    }

    if (d < min) {
	min = d;
    }

    return (min);
}