ABC013B - 錠

問題：B - 錠

#include <algorithm>
#include <cmath>
#include <cstdio>
#include <iostream>
using namespace std;

int main(void) {
    int a, b;

    scanf ("%d", &a);
    scanf ("%d", &b);
    printf ("%d\n", min(abs(b - a), 10 - abs(b - a)));
    return 0;
}