#include <stdio.h> int main() { long long K,A,a,B,n,ret,tmp; scanf("%lld %lld %lld",&K,&A,&B); n = (long long) A / K; n *= K; if (n < A) n += K; ret = 0; while (n <= B) { tmp = n; a = 0; while (tmp > 0) { a += (tmp % 10) * (tmp % 10); tmp /= 10; } if (K * a == n) {ret++;} n += K; } printf("%lld\n",ret); return 0; }
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 | #include <stdio.h> int main() { long long K,A,a,B,n,ret,tmp; scanf("%lld %lld %lld",&K,&A,&B); n = (long long) A / K; n *= K; if (n < A) n += K; ret = 0; while (n <= B) { tmp = n; a = 0; while (tmp > 0) { a += (tmp % 10) * (tmp % 10); tmp /= 10; } if (K * a == n) {ret++;} n += K; } printf("%lld\n",ret); return 0; } |