func_code_string: #include <bits/stdc++.h>   using namespace std;   inline long long rd() {     char c;     while (c = getchar(), c <  0  || c >  9 )       ;     long long X = c - 48;     while (c = getchar(), c >=  0  && c <=  9 ) X = X * 10 + c - 48;     return X;   }   template <class T>   inline void print(T x) {     if (x < 0) {       putchar( - );       return print(-x);     }     if (x < 10) {       putchar( 0  + x);       return;     }     print(x / 10);     putchar(x % 10 +  0 );   }   string s;   void solve(int n, vector<int> &a) {     if (n == 1) {       s =  B ;       return;     }     vector<int> idx(n + 1);     s = string(n,  B );     for (__typeof(0) i = (0) - ((0) > (n)); i != (n) - ((0) > (n));          i += 1 - (((0) > (n)) << 1))       idx[a[i]] = i;     for (__typeof(n + 1) i = (n + 1) - ((n + 1) > (1));          i != (1) - ((n + 1) > (1)); i += 1 - (((n + 1) > (1)) << 1)) {       for (int j = idx[i] - i; j >= 0; j -= i) {         if (a[j] > i and s[j] ==  B ) {           s[idx[i]] =  A ;           break;         }       }       for (int j = idx[i] + i; j < n; j += i) {         if (a[j] > i and s[j] ==  B ) {           s[idx[i]] =  A ;           break;         }       }     }   }   int32_t main() {     int n;     cin >> n;     vector<int> a(n);     for (int &i : a) cin >> i;     solve(n, a);     cout << s <<   n ;     return 0;   }   