#include using namespace std; using ll = long long; using ld = long double; #define FOR(i, m, n) for (int i = (m); i < (n); i++) #define FORR(i, m, n) for (int i = (m); i >= (n); i--) #define REP(i, n) FOR(i, 0, (n)) #define REPR(i, n) FORR(i, (n) - 1, 0) #define REP1(i, n) FOR(i, 1, (n) + 1) #define REPS(c, s) for (char c : s) #define ALL(c) (c).begin(), (c).end() #define SORT(c) sort(ALL(c)) #define REV(c) reverse(ALL(c)) #define sz(v) (int)v.size() template inline bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;} template inline bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;} const int MOD = 1000000007; const int INF = 1000000001; const ll LINF = 1000000001000000001LL; const char EOL = '\n'; void solve(); int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cout << fixed << setprecision(numeric_limits::max_digits10); solve(); return 0; } void solve() { int a, b, c; cin >> a >> b >> c; cout << min(abs(a - b), abs(b - c)) << EOL; }