#pragma comment(linker, "/STACK:1000000000")
#include <iostream>
#include <cmath>
#include <algorithm>
#include <vector>
#include <cstring>
#include <deque>
#include <stack>
#include <stdio.h>
#include <map>
#include <set>
#include <time.h>
#include <string>
#include <fstream>
#include <queue>
#include <bitset>
#include <cstdlib>
#define X first
#define Y second
#define mp make_pair
#define pb push_back
#define pdd pair<double,double>
#define pii pair<ll,ll>
#define PI 3.14159265358979323846
#define MOD 1000000007
#define MOD2 (33LL+(ll)1e+17)
#define INF (1LL+(ll)1e+9)
#define x1 fldgjdflgjhrthrl
#define x2 fldgjdflgrtyrtyjl
#define y1 fldggfhfghjdflgjl
#define y2 ffgfldgjdflgjl
#define SQ 500400
#define CI 43534
#define N 228228
#define eps 1e-9
typedef long long ll;
typedef long double ld;
using namespace std;
ll n, k;
void dfs(ll x)
{
    if (x == 1000000)
       return;
    dfs(x+1);
    k += x;
}
int main()
{
    cin >> n;
    dfs(1);
    cout << n-1 << endl;
    return 0;
}