#include<bits/stdc++.h>
#define ll long long
#define fi first
#define se second
using namespace std;
const int N = 6003;
string s, t;
int pi[2][N], knuth[2][N];
int ans = 0;
pair<int, int> kq;
void kmp(string &s, string &t, int x)
{
string tmp = s + '0' + t;
int n = tmp.size();
for (int i = 1; i < n; i++)
{
int j = pi[x][i - 1];
while (j > 0 && tmp[i] != tmp[j])
j = pi[x][j - 1];
if (tmp[i] == tmp[j])
j++;
pi[x][i] = j;
if(i > s.size())
knuth[x][i - s.size()] = j;//, cout << j << " ";
}
// cout << tmp << '\n';
}
int main ()
{
ios_base::sync_with_stdio(0);
cin.tie(0), cout.tie(0);
cin >> s >> t;
for(int i = 0; i < s.size(); i++)
{
string tmp = "";
for(int j = i; j < s.size(); j++)
tmp = tmp + s[j];
kmp(tmp, t, 0);
tmp = "";
reverse(t.begin(), t.end());
for(int j = i - 1; j >= 0; j--)
tmp = tmp + s[j];
kmp(tmp, t, 1);
reverse(t.begin(), t.end());
for(int j = 1; j <= t.size(); j++)
{
int rev = t.size() - j + 1;
if(ans < knuth[0][j] + knuth[1][rev - 1 ])
{
ans = knuth[0][j] + knuth[1][rev - 1];
kq.fi = i - knuth[1][rev - 1];
kq.se = j - knuth[0][j];
}
}
}
// reverse(t.begin(), t.end());
// for(int i = 0; i < s.size(); i++)
// {
// string tmp = "";
// for(int j = i; j < s.size(); j++)
// tmp = tmp + s[j];
// kmp(tmp, t, 0);
// tmp = "";
// reverse(t.begin(), t.end());
// for(int j = i - 1; j >= 0; j--)
// tmp = tmp + s[j];
// kmp(tmp, t, 1);
// reverse(t.begin(), t.end());
// for(int j = 1; j <= t.size(); j++)
// {
// int rev = t.size() - j + 1;
// if(ans < knuth[0][j] + knuth[1][rev - 1])
// {
// ans = knuth[0][j] + knuth[1][rev - 1];
// kq.fi = i - knuth[1][rev - 1];
// kq.se = t.size() - (j + knuth[1][rev - 1]);
// }
// }
// }
cout << ans << '\n';
cout << kq.fi << " " << kq.se;
return 0;
}
Compilation message
necklace.cpp: In function 'void kmp(std::string&, std::string&, int)':
necklace.cpp:27:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
27 | if(i > s.size())
| ~~^~~~~~~~~~
necklace.cpp: In function 'int main()':
necklace.cpp:38:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
38 | for(int i = 0; i < s.size(); i++)
| ~~^~~~~~~~~~
necklace.cpp:41:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
41 | for(int j = i; j < s.size(); j++)
| ~~^~~~~~~~~~
necklace.cpp:50:26: 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 j = 1; j <= t.size(); j++)
| ~~^~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
821 ms |
852 KB |
Output is correct |
| 2 |
Partially correct |
791 ms |
848 KB |
Output is partially correct |
| 3 |
Correct |
850 ms |
848 KB |
Output is correct |
| 4 |
Correct |
782 ms |
1104 KB |
Output is correct |
| 5 |
Correct |
716 ms |
616 KB |
Output is correct |
| 6 |
Correct |
794 ms |
604 KB |
Output is correct |
| 7 |
Correct |
807 ms |
852 KB |
Output is correct |
| 8 |
Partially correct |
772 ms |
600 KB |
Output is partially correct |
| 9 |
Correct |
811 ms |
640 KB |
Output is correct |
