Submission #880881

#	Time	Username	Problem	Language	Result	Execution time	Memory
880881		vjudge1	Necklace (Subtask 1-3) (BOI19_necklace1)	C++17	0 / 85	1561 ms	348 KiB

necklace

/// I'm only brave when I have to be
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define fast_io ios::sync_with_stdio(false);cin.tie(NULL);
#define file_io freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);
#define FOR(i,k,n) for(int i = k; i < n; ++ i)
#define debf cout<<"(0-0)\n";
#define all(x) x.begin(), x.end()
#define dec(x) cout << fixed << setprecision(x);
#define pf push_front
#define ppf pop_front
#define dash " ------- "
#define what(x) cerr << #x << " is " << x << endl;
#define eb emplace_back
//#define int short int
//#define int long long
#define sz(s) (int) (s.size())
#define fl cout.flush()

#pragma GCC optimize ("Ofast,unroll-loops")
#pragma GCC target ("avx2")

using namespace std;

typedef long long ll;
typedef pair <int, int> pii;
typedef pair <int, pii> pip;
typedef pair <pii, int> ppi;
typedef pair <ll, ll> pll;
typedef unsigned long long ull;
typedef long double ld;

template <class T> using max_heap = priority_queue <T, vector <T>, less <T> >;
template <class T> using min_heap = priority_queue <T, vector <T>, greater <T> >;

constexpr int MOD = 1e9 + 7, N = 2e5 + 8, M = 1e5, SQ = 300, INF = 2e9 + 8, LGN = 21, mod = 998244353, P = 131113;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int ans, ind1, ind2;
string s, t;

int32_t main(){
  fast_io;
  cin >> s >> t;
  for (int len = 1; len < s.size(); ++ len){
    for (int i = 0; i < s.size() - len + 1; ++ i){
      for (int j = 0; j < t.size(); ++ j){
        for (int k = 1; k < len; ++ k){
          if (j + k < t.size() && j - (len - k) >= 0){ ///
            string s1 = "", t1 = "";
            for (int o = i; o < i + len; ++ o){
              s1 += s[o];
            }
            for (int o = j; o < j + k; ++ o){
              t1 += t[o];
            }
            for (int o = j - (len - k); o < j; ++ o){
              t1 += t[o];
            }
            if (s1 == t1){
              ans = len;
              ind1 = i;
              ind2 = j - (len - k);
            }
          }
          if (j - k + 1 >= 0 && j + (len - k) < t.size()){
            string s2 = "", t2 = "";
            for (int o = i; o < i + len; ++ o){
              s2 += s[o];
            }
            for (int o = j; o >= j - k + 1; -- o){
              t2 += t[o];
            }
            for (int o = j + (len - k); o > j; -- o){
              t2 += t[o];
            }
            if (s2 == t2){
              ans = len;
              ind1 = i;
              ind2 = j - k + 1;
            }
          }
        }
      }
    }
  }
  cout << ans << '\n';
  cout << ind1 << " "<< ind2 << '\n';
  return 0;
}

// Yesterday is history
// Tomorrow is a mystery
// but today is a gift
// That is why it is called the present

Compilation message (stderr)

necklace.cpp: In function 'int32_t main()':
necklace.cpp:49:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |   for (int len = 1; len < s.size(); ++ len){
      |                     ~~~~^~~~~~~~~~
necklace.cpp:50:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |     for (int i = 0; i < s.size() - len + 1; ++ i){
      |                     ~~^~~~~~~~~~~~~~~~~~~~
necklace.cpp:51:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |       for (int j = 0; j < t.size(); ++ j){
      |                       ~~^~~~~~~~~~
necklace.cpp:53:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |           if (j + k < t.size() && j - (len - k) >= 0){ ///
      |               ~~~~~~^~~~~~~~~~
necklace.cpp:70:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |           if (j - k + 1 >= 0 && j + (len - k) < t.size()){
      |                                 ~~~~~~~~~~~~~~^~~~~~~~~~

• Subtask 1: 0 / 25
• Subtask 2: 0 / 20
• Subtask 3: 0 / 40