1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #include <iostream>
using namespace std;
int licz(int n){
int q = 0 , w = 0;
do{
w = n % 10;
q = (w*w) + q;
n = n - w;
n = n / 10;
} while (n>1);
return q;
}
int main(int argc)
{
int k , a , b , n = 0;
cin >> k >> a >> b;
for (int i = a; i <= b; i++)
{
if ((i%k)==0){
if (i / k == licz(i)){
n++;
}
}
}
cout << n;
return 0;
}
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