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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. typedef pair<ll, ll> Pair;
  5. #define pb push_back
  6.  
  7. int main() {
  8.     ios_base::sync_with_stdio(0); 
  9.     cin.tie(0);
  10.  
  11.     ll n;
  12.     cin >> n;
  13.     vector<ll> a(n + 1), b(n + 1);
  14.  
  15.     for (ll i = 1; i <= n; i++) cin >> a[i];
  16.     for (ll i = 1; i <= n; i++) cin >> b[i];
  17.  
  18.     vector<Pair> ans;
  19.     vector<char> ch;
  20.     ans.pb({1, n});
  21.     ch.pb('I');
  22. 	sort(a.begin() + 1, a.end());
  23.     for (ll i = 1; i <= n; i++) {
  24.         if (a[i] == b[i]) continue;        
  25.         ll j = i + 1;
  26.         while (a[j] != b[i]) j++;
  27.         sort(a.begin() + i, a.begin() + j + 1);
  28.         ans.pb({i, j});
  29.  
  30.         if (b[i] > a[i]) {
  31.             ch.pb('D');
  32.             reverse(a.begin() + i, a.begin() + j + 1);
  33.         }
  34.         else ch.pb('I');
  35.     }
  36.  
  37.     cout << ans.size() << "\n";
  38.     for (ll i = 0; i < ans.size(); i++) {
  39.         cout << ans[i].first << " " << ans[i].second << " " << ch[i] << "\n";
  40.     }
  41.  
  42.     return 0;
  43. }
  44.  
Success #stdin #stdout 0s 5296KB
comments (?)
stdin
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5
2 4 5 1 3
5 4 3 2 1
stdout
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2
1 5 I
1 5 D
https://ideone.com/IVTeyJ
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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