x=int(input())
print(2-x*x)#include<bits/stdc++.h>
using namespace std;
int main(){
int x; cin>>x;
cout<<2-x*x<<endl;
}478B - Random Teams | 1705C - Mark and His Unfinished Essay |
1401C - Mere Array | 1613B - Absent Remainder |
1536B - Prinzessin der Verurteilung | 1699B - Almost Ternary Matrix |
1545A - AquaMoon and Strange Sort | 538B - Quasi Binary |
424A - Squats | 1703A - YES or YES |
494A - Treasure | 48B - Land Lot |
835A - Key races | 1622C - Set or Decrease |
1682A - Palindromic Indices | 903C - Boxes Packing |
887A - Div 64 | 755B - PolandBall and Game |
808B - Average Sleep Time | 1515E - Phoenix and Computers |
1552B - Running for Gold | 994A - Fingerprints |
1221C - Perfect Team | 1709C - Recover an RBS |
378A - Playing with Dice | 248B - Chilly Willy |
1709B - Also Try Minecraft | 1418A - Buying Torches |
131C - The World is a Theatre | 1696A - NIT orz |