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Submission #73378

# Submission time Handle Problem Language Result Execution time Memory
73378 2018-08-28T08:01:44 Z Vardanyan Palindromes (APIO14_palindrome) C++14
0 / 100
 1000 ms 29828 KB 
#pragma GCC optimize "-O3"
#include <bits/stdc++.h>
using namespace std;
const int N = 3000*100+7;
const long long MOD = 1000000007;
long long h1[N],h2[N];
long long p[N];
long long hashcode1(int l,int r){
    return h1[r]-(h1[l-1]*p[r-l+1])%MOD;
}
long long hashcode2(int l,int r){
    return h2[r]-(h2[l-1]*p[r-l+1])%MOD;
}
int main()
{
    string s;
    cin>>s;
    int n = s.length();
    p[0] = 1;
    for(int i = 1;i<=n;i++) p[i] = (p[i-1]*239)%MOD;
    string srev = s;
    reverse(srev.begin(),srev.end());
    for(int i = 1;i<=n;i++){
        h1[i] = (h1[i-1]*239+s[i-1])%MOD;
        h2[i] = (h2[i-1]*239+srev[i-1])%MOD;
    }
    map<long long,int> mp;
    int ans = 0;
    for(int i = 1;i<=n;i++){
        for(int j = i;j<=n;j++){
            int x = hashcode1(i,j);
            int jj = n-i+1;
            int ii = n-j+1;
            int y = hashcode2(ii,jj);
            if(x == y){
                    mp[x]++;
                    ans = max(ans,(j-i+1)*mp[x]);
            }
        }
    }
    cout<<ans<<endl;
    return 0;
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 2 ms 576 KB Output is correct
5 Correct 2 ms 576 KB Output is correct
6 Correct 2 ms 576 KB Output is correct
7 Correct 2 ms 576 KB Output is correct
8 Correct 2 ms 720 KB Output is correct
9 Correct 3 ms 720 KB Output is correct
10 Correct 2 ms 720 KB Output is correct
11 Correct 2 ms 720 KB Output is correct
12 Correct 2 ms 720 KB Output is correct
13 Incorrect 3 ms 720 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 34 ms 768 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1081 ms 2312 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 1078 ms 13184 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 1086 ms 29828 KB Time limit exceeded
2 Halted 0 ms 0 KB -