//Visual Studio 2015; C++ Console App #include <iostream> #include <cstdlib> //Trace On using namespace std; //Integer's Length int intlength(int n) { int len = 1; if (n > 0) { for (len = 0; n > 0; len++) { n = n / 10; } } return len; } //f(n) function int f(int n) { int result = 0; int l = intlength(n); for (int i = 0; i < l; i++) { int d = n % 10; n = n / 10; result += (d*d); } return result; } //I am the bone of my code int main() { int a,k,b; cin >> k; cin >> a; cin >> b; int result = 0; for (int i = a; i <= b; i++) { if (k * f(i) == i) { //cout << "(n = " << i << ")"; result++; } } cout<< result; system("pause"); }
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 45 46 47 48 49 50 51 52 53 54 55 56 57 | //Visual Studio 2015; C++ Console App #include <iostream> #include <cstdlib> //Trace On using namespace std; //Integer's Length int intlength(int n) { int len = 1; if (n > 0) { for (len = 0; n > 0; len++) { n = n / 10; } } return len; } //f(n) function int f(int n) { int result = 0; int l = intlength(n); for (int i = 0; i < l; i++) { int d = n % 10; n = n / 10; result += (d*d); } return result; } //I am the bone of my code int main() { int a,k,b; cin >> k; cin >> a; cin >> b; int result = 0; for (int i = a; i <= b; i++) { if (k * f(i) == i) { //cout << "(n = " << i << ")"; result++; } } cout<< result; system("pause"); } |