Submission #485298

#	Time	Username	Problem	Language	Result	Execution time	Memory
485298		xiaowuc1	구간 성분 (KOI15_interval)	C++17	100 / 100	388 ms	664 KiB

interval

#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <chrono>
#include <cstring>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <unordered_map>
#include <vector>

using namespace std;

// BEGIN NO SAD
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define trav(a, x) for(auto& a : x)
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
typedef vector<int> vi;
#define f first
#define s second
#define derr if(1) cerr
// END NO SAD

template<class Fun>
class y_combinator_result {
  Fun fun_;
public:
  template<class T>
  explicit y_combinator_result(T &&fun): fun_(std::forward<T>(fun)) {}

  template<class ...Args>
  decltype(auto) operator()(Args &&...args) {
    return fun_(std::ref(*this), std::forward<Args>(args)...);
  }
};

template<class Fun>
decltype(auto) y_combinator(Fun &&fun) {
  return y_combinator_result<std::decay_t<Fun>>(std::forward<Fun>(fun));
}

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<vector<ll>> matrix;

void solve() {
  string a, b;
  cin >> a >> b;
  auto genhash = [&](const string& s, int len, vector<vector<int>>& f) {
    vector<int> amt(26);
    for(int i = 0; i < sz(s); i++) {
      amt[s[i]-'a']++;
      if(i >= len) amt[s[i-len]-'a']--;
      if(i >= len - 1) f.pb(amt);
    }
  };
  int ret = min(sz(a), sz(b));
  while(ret > 0) {
    vector<vector<int>> av, bv;
    genhash(a, ret, av);
    genhash(b, ret, bv);
    sort(all(av));
    sort(all(bv));
    int i = 0;
    int j = 0;
    bool found = false;
    while(i < sz(av) && j < sz(bv) && !found) {
      if(av[i] == bv[j]) found = true;
      else if(av[i] < bv[j]) i++;
      else j++;
    }
    if(found) {
      cout << ret << "\n";
      return;
    }
    ret--;
  }
  cout << ret << "\n";
}

// what would chika do
// are there edge cases (N=1?)
// are array sizes proper (scaled by proper constant, for example 2* for koosaga tree)
// integer overflow?
// DS reset properly between test cases
// are you doing geometry in floating points
// are you not using modint when you should

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  solve();
}

• Subtask 1: 7 / 7
• Subtask 2: 23 / 23
• Subtask 3: 31 / 31
• Subtask 4: 39 / 39