Armstrong Number
#include<iostream>
#include<math.h>
using namespace std;
int main(){
int n,prev;
cin>>n;
prev=n;
int count =0;
int ans=0;
count = (n == 0) ? 1 : (log10(n) + 1);
while (n>0)
{
ans= ans+ pow(n%10,count);
n=n/10;
}
ans==prev? cout<<"true":cout<<"false";
return 0;
}