#include #define FOR(i,bg,ed) for(ll i=(bg);i<(ed);i++) #define REP(i,n) FOR(i,0,n) #define MOD 1000000007 #define int long long using namespace std; typedef long long ll; const int INF = 1e9; signed main() { int N; cin >> N; cout << N - 1 << endl; }