#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int s,n; cin>>s; if(s%2!=0){ n=10000-s/2; } else{ n=10000-s/2*2+2; } cout<<n; return 0; }