Submission #23586

#	Time	Username	Problem	Language	Result	Execution time	Memory
23586		Hassoony	Palindromes (APIO14_palindrome)	C++14	8 / 100	1000 ms	131072 KiB

palindrome

#include<bits/stdc++.h>
#define MEM(dp,i) memset(dp,i,sizeof(dp))
#define R return
#define F first
#define S second
#define C continue
#define pb push_back
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
const int MX=1009;
const ll mod=1e9+7;
const ll inf=(1ll<<60);
ll n;
string s;
map<string,pll>m;
int main(){
    cin>>s;
    n=s.size();
    for(int i=0;i<n;i++){
        string tmp="";
        for(int j=i;j<n;j++){
            tmp+=s[j];
            m[tmp].F=i;
            m[tmp].S++;
        }
    }
    ll ans=0;
    for(auto pp:m){
        string x=pp.F;
        ll i=pp.S.F,b=0;
        ll k=pp.S.S;
        ll y=x.size();
        for(int i=0;i<y/2;i++){
            if(x[i]!=x[y-i-1])b=1;
        }
        if(!b)ans=max(ans,y*k);
    }
    cout<<ans<<endl;
}

Compilation message (stderr)

palindrome.cpp: In function 'int main()':
palindrome.cpp:32:12: warning: unused variable 'i' [-Wunused-variable]
         ll i=pp.S.F,b=0;
            ^

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