func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[1000000 + 5];   int b[1000000 + 5];   int main() {     ios_base::sync_with_stdio(false);     int i, j, n, k;     queue<pair<int, int> > q;     cin >> n;     for (i = 1; i <= n; i++) cin >> a[i];     for (i = 1; i <= n; i++) cin >> b[i];     for (i = 1; i <= n; i++) {       if (a[i] != b[i]) {         for (j = i + 1; j <= n; j++) {           if (a[i] == b[j]) {             k = j;             break;           }         }         for (j = k; j > i; j--) {           q.push(make_pair(j - 1, j));           int t = b[j];           b[j] = b[j - 1];           b[j - 1] = t;         }       }     }     cout << q.size() << endl;     while (q.empty() != 1) {       cout << q.front().first <<     << q.front().second << endl;       q.pop();     }     return 0;   }   