Submission #982631

#	Time	Username	Problem	Language	Result	Execution time	Memory
982631		vjudge1	Palindromic Partitions (CEOI17_palindromic)	C++17	35 / 100	10096 ms	608 KiB

palindromic

#include <bits/stdc++.h>
#define pii pair<int,int>
#define int long long
#define ff first
#define ss second
using namespace std;

void solve()
{
    
    string s;
    cin >> s;
    int n = s.length();
    vector<int> dp(n/2+2,0);
    int back = n-1;
    for (int i = 0; i < n/2+1; i++)
    {
        if (i >= back)
            break;
        for(int j = 0; j <= i; j++)
        {
            //cout << s.substr(j,i-j+1) << ' ' << s.substr(back,i-j+1) << " i: " << i << " j: " << j << '\n';
            if (s.substr(j,i-j+1) == s.substr(back,i-j+1))
            {
                if (j==0)
                    dp[i] = max(dp[i],2ll);
                else if (dp[j-1] > 0)
                    dp[i] = max(dp[i],dp[j-1]+2);
            }
        }
        back--;
    }
    int ans = 1;
    if (n%2)
    {
        for (int i = 0; i < n/2+1; i++)
        {
            ans = max(ans,dp[i]+1);   
        }
    }
    else
    {
        for (int i = 0; i < n/2-1; i++)
        {
            ans = max(ans,dp[i]+1);
        }
        ans = max(ans,dp[n/2-1]);
    }
    cout << ans << '\n';
}

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t;
    cin >> t;
    
    while(t--)
    {
       solve();
    }
    
    
    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 20 / 20
• Subtask 3: 0 / 25
• Subtask 4: 0 / 40