[CCF CSP] 201912-1 count off

#include<iostream>
using namespace std;

int main()
{
    int n, res[4]={0};
    cin >> n;
    for (int i = 1; i < n+1; i++)
    {
        if (i%10 == 7 || i%7 == 0 || (i/10)%10 == 7 || (i/100)%10 == 7)
        {
            res[(i-1)%4]++;
            n++;
        }
    }
    for (int i = 0; i < 4; i++) cout << res[i] << endl;
    return 0;
}

NOTE: Do not be n <= 666, without influence to judge whether the hundreds digit 7. Because the figure is not escape, so the number of possible number more than 700.