func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, u, d, l, r, i, h[10005];   string a;   int main() {     cin >> n >> a;     for (i = 0; i < n; i++) {       if (a[i] ==  0 ) d = r = l = 1;       if (a[i] ==  1  || a[i] ==  2  || a[i] ==  3 ) u = 1;       if (a[i] ==  1  || a[i] ==  4  || a[i] ==  7 ) l = 1;       if (a[i] ==  3  || a[i] ==  6  || a[i] ==  9 ) r = 1;       if (a[i] ==  7  || a[i] ==  9 ) d = 1;     }     if (u == 1 && d == 1 && r == 1 && l == 1)       cout <<  YES ;     else       cout <<  NO ;     return 0;   }   