oj.uz

Submission #900064

# Submission time Handle Problem Language Result Execution time Memory
900064 2024-01-07T14:29:05 Z 1075508020060209tc Palindromes (APIO14_palindrome) C++14
23 / 100
 1000 ms 21260 KB 
#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define X first
#define Y second
#define SZ(x) (int)(x).size()
const int mod=1e9+9;
int qpow(int x,int t){
if(t==0){return 1;}
if(t%2==1){return qpow(x,t-1)*x%mod;}
int xx=qpow(x,t/2);
return xx*xx%mod;
}
int tme[500005];
struct rlhsh{
vector<int>hsh;
int n;
void init(string s){
n=s.size();
hsh.resize(s.size()+10,0);
for(int i=1;i<=n;i++){
    hsh[i]=(hsh[i-1]+(s[i-1]-'a'+1)*tme[i])%mod;
}
}
int gthsh(int l,int r){
int ret=(hsh[r]-hsh[l-1]+mod)*qpow(tme[l-1],mod-2)%mod;
return ret;
}
};
 
int n;
 
pair<int,int>rev(int l,int r){
l=n-l+1;r=n-r+1;
swap(l,r);
return {l,r};
}
 
string s;
 
signed main(){
 
tme[0]=1;
for(int i=1;i<=500000;i++){
    tme[i]=tme[i-1]*37%mod;
}
 
cin>>s;
n=s.size();
rlhsh sh;
sh.init(s);
reverse(s.begin(),s.end());
rlhsh rsh;
rsh.init(s);
int ans=1;
unordered_map<int,int>mp;
for(int i=1;i<=n;i++){
    for(int j=i;j<=n;j++){
        int v=sh.gthsh(i,j);
        if(v==rsh.gthsh(n-j+1,n-i+1)){
            mp[v]++;
            ans=max(ans,mp[v]*(j-i+1));
        }
    }
}
cout<<ans<<"\n";
 
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4188 KB Output is correct
2 Correct 4 ms 4188 KB Output is correct
3 Correct 3 ms 4188 KB Output is correct
4 Correct 3 ms 4188 KB Output is correct
5 Correct 3 ms 4188 KB Output is correct
6 Correct 4 ms 4188 KB Output is correct
7 Correct 3 ms 4188 KB Output is correct
8 Correct 3 ms 4188 KB Output is correct
9 Correct 3 ms 4140 KB Output is correct
10 Correct 3 ms 4188 KB Output is correct
11 Correct 4 ms 4188 KB Output is correct
12 Correct 3 ms 4188 KB Output is correct
13 Correct 4 ms 4188 KB Output is correct
14 Correct 4 ms 4188 KB Output is correct
15 Correct 3 ms 4124 KB Output is correct
16 Correct 3 ms 4188 KB Output is correct
17 Correct 4 ms 4188 KB Output is correct
18 Correct 3 ms 4192 KB Output is correct
19 Correct 5 ms 4188 KB Output is correct
20 Correct 6 ms 4184 KB Output is correct
21 Correct 6 ms 4184 KB Output is correct
22 Correct 5 ms 4188 KB Output is correct
23 Correct 6 ms 4352 KB Output is correct
24 Correct 5 ms 4188 KB Output is correct
25 Correct 5 ms 4188 KB Output is correct
26 Correct 5 ms 4188 KB Output is correct
27 Correct 6 ms 4188 KB Output is correct
28 Correct 6 ms 4188 KB Output is correct
29 Correct 6 ms 4184 KB Output is correct
30 Correct 6 ms 4188 KB Output is correct
31 Correct 5 ms 4188 KB Output is correct
32 Correct 5 ms 4188 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 227 ms 4188 KB Output is correct
2 Correct 221 ms 4632 KB Output is correct
3 Correct 225 ms 4188 KB Output is correct
4 Correct 217 ms 4372 KB Output is correct
5 Correct 224 ms 4388 KB Output is correct
6 Correct 222 ms 4188 KB Output is correct
7 Correct 216 ms 4384 KB Output is correct
8 Correct 227 ms 4400 KB Output is correct
9 Correct 218 ms 4372 KB Output is correct
10 Correct 215 ms 4188 KB Output is correct
11 Correct 216 ms 4432 KB Output is correct
12 Correct 217 ms 4188 KB Output is correct

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1070 ms 4700 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 26.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1025 ms 11104 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1062 ms 21260 KB Time limit exceeded
2 Halted 0 ms 0 KB -