#include<iostream> using namespace std; bool containsSeven(int num) { while (num > 0) { if (num % 10 == 7) { return true; } num /= 10; } return false; } int main() { int n; cin >> n; int sum = 0; for (int i = 1; i <= n; i++) { if (i % 7 != 0 && !containsSeven(i)) { sum += i * i; } } cout << sum << endl; return 0; }