Submission #45588316

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Source Code Expand

#include<bits/stdc++.h>
#include<atcoder/all>

using namespace std;
using namespace atcoder;
typedef long long ll;

#define rep(i,n) for(ll i=0;i<n;++i)
#define rrep(i,n) for(ll i=n-1;i>=0;--i)
#define FOR(i,s,e) for(ll i=s;i<=e;++i)
#define FFOR(i,s,e) for(ll i=s;i>=e;--i)

#define yesno(flg) if(flg){cout<<"Yes"<<endl;}else{cout<<"No"<<endl;}
#define ALL(a) (a).begin(),(a).end()
#define mp make_pair
#define pb push_back
#define vl vector<ll>
#define vs vector<string>
#define so(a) sort(a.begin(),a.end())

#define fi first
#define se second
#define print(a) cout<<a<<endl
#define ssize(a) (ll)(a.size())

#define MAX_N 1002
#define i197 1000000007
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }


const ll INF=1000000000000000001;
struct edge
{
	int to, cost;
};

struct pos{
	// 1 変数を入れる;
	ll t;
	ll x,y;
	set<ll> st;

};
int dx[4] = { 1, 0, -1, 0};
int dy[4] = { 0, 1, 0, -1};
int dd[5] = { 0, 1, 0, -1, 0};

typedef pair<ll, ll> P2;
typedef pair<pair<ll,ll>,ll> P3;
typedef pair<string,ll> Ps;
typedef pair<pair<ll,ll>,pair<ll,ll> > P4;



int main(){

	ios::sync_with_stdio(0);
	cin.tie(0);

	string s;
	cin>>s;

	ll ans=0;
	rep(i,ssize(s)){
		FOR(j,i,ssize(s)-1){
			ll f=0;
			rep(k,ssize(s)){
				if(i+k>j-k)break;
				if(s[i+k]!=s[j-k])f=1;
			}
			if(!f)chmax(ans,j-i+1);

		}
	}
	print(ans);


	return 0;
}

Submission Info

Judge Result