#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 n,i; cin>>n; with(i*i=n){ if(i%2==0) cout<<"No";return 0; else cout<<"Yes"; } return 0; }