#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
using namespace std;
#define db long double
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define vll vector<pll>
#define endl '\n'
#define all(x) x.begin(), x.end()
#define fastio\
ios_base::sync_with_stdio(0);\
cin.tie(0);\
cout.tie(0)\
#define int long long
const int sz = 1e6 + 5;
const int mod = 1e9 + 7;
string s;
int t, n, pre[sz], pw[sz], inv[sz];
map<pii, int> memo;
int sum(int a, int b){
return (a + b) % mod;
}
int mult(int a, int b){
return (a % mod) * (b % mod) % mod;
}
int sub(int a, int b){
return (a - b + mod) % mod;
}
int binpow(int a, int b){
if(b == 0) return 1;
if(b & 1) return (a % mod * binpow(a, b - 1)) % mod;
return binpow(a * a % mod, b / 2) % mod;
}
int get_hash(int l, int r){
return mult(sub(pre[r], pre[l - 1]), inv[l - 1]);
}
signed main(){
fastio;
cin >> t;
while(t--){
cin >> s;
n = s.size();
s = ' ' + s;
pw[0] = 1, inv[0] = 1;
for(int i = 1; i <= n; i++){
pw[i] = mult(pw[i - 1], 29);
inv[i] = binpow(pw[i], mod - 2);
pre[i] = sum(pre[i - 1], mult(s[i] - 'a' + 1, pw[i]));
}
int res = 0, p = 0;
while(p < (n + 1) / 2){
int best = n - 2 * p;
for(int i = 1; i <= n - 2 * p; i++){
if(get_hash(p + 1, p + i) == get_hash(n - p - i + 1, n - p)){
best = i;
break;
}
}
res += 2, p += best;
}
cout << res - 1 << endl;
}
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
1 ms |
2392 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |