题解 | #与7无关的数#
与7无关的数
https://www.nowcoder.com/practice/776d401bf86d446fa783f0bef7d3c096
#include <bits/stdc++.h>
using namespace std;
int main() {
int sum = 0;
int n = 0;
cin >> n;
for (int i = 1; i <= n; ++i) {
if (i % 7 != 0 && (i % 10 != 7) && (i / 10) % 10 != 7) {
sum = sum + i * i;
}
}
cout << sum << endl;
return 0;
}
