#include <bits/stdc++.h>
#define el '\n'
#define fi first
#define sc second
//#define int ll
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
using namespace std;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
const int mod=1e9+7;
const int N=2e6+11;
int d1[N], d2[N], tmp[N];
string s;
void manacher1(string s, int* p)
{
int n=s.length();
s = "<"+s+">";
int l=0, r=1;
for(int i=1; i<=n; i++)
{
if(i>r) p[i]=0;
else p[i]=min(r-i, p[l+r-i]);
while(1<=i-p[i] && i+p[i]<=n && s[i-p[i]]==s[i+p[i]]) p[i]++; // mo rong p[i]
p[i]--; // bo tam
if(i+p[i]>r)
{
l=i-p[i];
r=i+p[i];
}
}
}
void manacher2(string s, int* p)
{
int n = s.length();
string s1 = "";
for(char v: s) s1 += '.', s1 += v;
s1 += '.';
manacher1(s1, tmp);
for(int i=1; i<=n; i++) p[i] = tmp[i*2-1]/2;
}
void sol()
{
cin >> s;
int n=s.length();
manacher1(s, d1);
manacher2(s, d2);
s=" "+s;
int l=-1, r=-1;
int c1, c2;
for (int i=1; i<=n; i++)
{
c1 = i-d1[i];
c2 = i+d1[i];
if (c2-c1+1 > r-l+1) l = c1, r = c2;
c1 = i-d2[i];
c2 = i+d2[i]-1;
if (c1>=1 && c2<=n && c1<=c2 && c2-c1+1 > r-l+1) l=c1, r=c2;
}
cout << r-l+1;
}
signed main()
{
// freopen("divisor.INP", "r", stdin);
// freopen("divisor.OUT", "w", stdout);
ios_base::sync_with_stdio(0);
cin.tie(0);
int t=1;
//cin >> t;
while(t--)
{
sol();
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Incorrect |
0 ms |
340 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
596 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
4 ms |
2468 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
10 ms |
6624 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |