Submission #422874

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
422874	2021-06-10 13:25:19	abdzag	Necklace (Subtask 1-3) (BOI19_necklace1)	C++17	85 / 85	409 ms	71184 KiB

necklace

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#include<bits/stdc++.h>
#include<unordered_map>
#define rep(i,a,b) for(int i=int(a);i<int(b);i++)
#define rrep(i,a,b) for(int i=int(a);i>int(b);i--)
#define trav(a,v) for(auto& a: v)
#define sz(v) v.size()
#define all(v) v.begin(),v.end()
#define vi vector<int>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
const long long inf = 1e15;
int main() {
  cin.sync_with_stdio(false);
  string a, b;
  cin >> a >> b;
  ll ans = 0;
  ll pos1, pos2;
  vector<vector<ll>> v(3001, vector<ll>(3001));
  rep(i, 0, b.size()) {
    ll counter = 0;
    rep(j, 1, a.size()+1) {
      if (b[i+counter] == a[j-1])v[i][j] = ++counter;
      else {
        while (b[i + counter] != a[j - 1] && counter)counter--;
        if (b[i + counter] == a[j - 1])v[i][j] = ++counter;
      }
    }
 
 
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• Subtask 1: 25 / 25
• Subtask 2: 20 / 20
• Subtask 3: 40 / 40