using namespace std; string change(int num){ string s; stringstream ss; ss << num; ss >> s; return s; } int main(){ int n; cin >> n; int a=0, b=0, c=0, d=0; for(int i = 1; i <= n; i++){ if(i%4==1) { if(i%7==0 || change(i).find("7")!=string...