#include <iostream>
using namespace std;

int main() {
	int a, a1, a2, a3, c, d;
	cin >> a;
	a1 = a / 100;
	a2 = a / 10 - a1 * 10;
	a3 = a % 10;
	c = a1;
	if (a2 > c) {
		c = a2;
	}
	if (a3 > c) {
		c = a3;
	}
	d = a1;
	if (a2 < d) {
		d = a2;
	}
	if (a3 < d) {
		d = a3;
	}
	cout << c - d;
	return 0;
}


```学渣专用

#include <bits/stdc++.h>
using namespace std;

int main() {
    int n;
    cin >> n;

    int a = n / 100;        // 百位
    int b = n / 10 % 10;    // 十位
    int c = n % 10;         // 个位

    int maxNum = a;
    int minNum = a;

    if (b > maxNum) maxNum = b;
    if (c > maxNum) maxNum = c;

    if (b < minNum) minNum = b;
    if (c < minNum) minNum = c;

    cout << maxNum - minNum;
    return 0;
}