Submission #330769

#	Time	Username	Problem	Language	Result	Execution time	Memory
330769		Valera_Grinenko	Lock Puzzle (innopolis2018_final_A)	C++17	0 / 100	1 ms	364 KiB

A

#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization ("unroll-loops")
#include <iostream>
#include <fstream>
#include <algorithm>
#include <vector>
#include <set>
#include <stack>
#include <map>
#include <unordered_map>
#include <iomanip>
#include <cmath>
#include <queue>
#include <bitset>
#include <numeric>
#include <array>
#include <cstring>
#include <random>
#include <chrono>
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define make_unique(x) sort(all((x))); (x).resize(unique(all((x))) - (x).begin())
typedef long long ll;
typedef long double ld;
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
// template<class T>
// using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
int main() {

  ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

  int n, m;

  cin >> n >> m;

  string a, b;

  cin >> a >> b;

  int am[26] = {0};

  for(auto& x : a) am[x - 'a']++;
  for(auto& x : b) am[x - 'a']--;

  for(int i = 0; i < n; i++)
    if(am[i] != 0) {
      cout << -1;
      return 0;
    }

  vector<int> ans;

  for(int i = 0; i < n; i++) {
    if(a[i] == b[i]) continue;
    if(a.back() == b[i]) {
      ans.pb(n - i);
      string p = a.substr(0, i), s = a.substr(i, n - i);
      reverse(all(s));
      a = p + s;
    } else {
      for(int j = i + 1; j < n; j++)
        if(a[j] == b[i]) {
          ans.pb(n - j);
          string p = a.substr(0, j), s = a.substr(j, n - j);
          reverse(all(s));
          a = p + s;
          break;
        }
      ans.pb(n - i);
      string p = a.substr(0, i), s = a.substr(i, n - i);
      reverse(all(s));
      a = p + s;
    }
  }

  if(ans.size() > m) { cout << -1; return 0; }

  cout << ans.size() << endl;

  for(auto& x : ans) cout << x << ' ';

  return 0;
}
/*

*/

Compilation message (stderr)

A.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      | 
A.cpp: In function 'int main()':
A.cpp:85:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   85 |   if(ans.size() > m) { cout << -1; return 0; }
      |      ~~~~~~~~~~~^~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 21
• Subtask 3: 0 / 24
• Subtask 4: 0 / 12
• Subtask 5: 0 / 12
• Subtask 6: 0 / 11
• Subtask 7: 0 / 11