题解 | 牛牛数数

#include<bits/stdc++.h>
using namespace std;
int main() {
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++) {
        if (i % 4 == 0) continue;
        int a = i;
        int ok = 0;
        while (a) {
            if (a % 10 == 4) ok = 1;
            a /= 10;
        }
        if (ok) continue;
        cout << i << endl;
    }
}