#include #include #define elif else if #define ll long long #define vll vector #define vec vector #define embk emplace_back #define rep(i, n) for (int i = 0; i < n; i++) #define rep3(i, n, k) for (int i = k; i < n; i++) #define all(a) a.begin(), a.end() using namespace std; using namespace atcoder; const ll INF = 1LL << 60; const ll mod = 998244353; int main() { ll a, b; cin >> a >> b; cout << abs(a-b) << endl; }