백준 소스코드 [C++] 1701 Cubeditor

www.acmicpc.net/problem/1701

1701번: Cubeditor

백준 소스코드 [C++] 1701 Cubeditor

#include <iostream>
#include <algorithm>
#include <queue>
#include <string.h>
#include <limits.h>
#include <vector>
#include <math.h>
#include <stack>
#include <bitset>
#include <string>
#include <set>
#define all(v) v.begin(), v.end()
#define pii pair<int,int>
#define make_unique(v) v.erase(unique(v.begin(), v.end()), v.end())
typedef long long ll;
using namespace std;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	string s;
	cin >> s;
	vector<int> v(s.size());
	int res = 0;
	for (int i = 0;i < s.size();i++) {
		for (int j = 0;j < s.size();j++)
			v[j] = i;
		for (int j = i + 1, k = i;j < s.size();j++) {
			while (k > i && s[j] != s[k])
				k = v[k - 1];
			if (s[j] == s[k]) {
				v[j] = ++k;
				res = max(res, k-i);
			}
		}
	}
	cout << res;
	return 0;
}