Submission #712974

#	Time	Username	Problem	Language	Result	Execution time	Memory
712974		bin9638	Palindromes (APIO14_palindrome)	C++17	23 / 100	1066 ms	988 KiB

palindrome

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define N 1000010
#define ii pair<int,int>
#define fs first
#define sc second
#define ld double

string s;
int n;
map<string,int>mp;

bool check_palin(int l,int r)
{
    for(int i=1;i*2<=(r-l+1);i++)
        if(s[l+i-1]!=s[r-i+1])
            return 0;
    return 1;
}

int solve(int k)
{
    int cnt=0;
    mp.clear();
    for(int i=1;i<=n-k+1;i++)
        if(check_palin(i,i+k-1))
            cnt=max(cnt,++mp[s.substr(i,k)]);
    return cnt*k;
}

int main()
{
    #ifdef SKY
    freopen("A.inp","r",stdin);
    freopen("A.out","w",stdout);
    #endif // SKY
    ios::sync_with_stdio(0);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>s;
    n=s.size();
    s=" "+s;
    int res=0;
    for(int i=1;i<=n;i++)
    {
        int val=solve(i);
        res=max(res,val);
    }
    cout<<res;
}

• Subtask 1: 8 / 8
• Subtask 2: 15 / 15
• Subtask 3: 0 / 24
• Subtask 4: 0 / 26
• Subtask 5: 0 / 27