Submission #1910159

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Source Code Expand

#include <bits/stdc++.h>
 
using namespace std;
 
#define pb push_back
#define mp make_pair
#define bin(x,b) bitset<b> vb(x); cout << vb << '\n';
 
#if ( ( _WIN32 || __WIN32__ ) && __cplusplus < 201103L)
    #define lld "%I64d"
#else
    #define lld "%lld"
#endif
 
typedef unsigned long long ll;
typedef pair <int,int> pi;
 
const long double EPS = 1e-10;
const ll MOD = 1e9 + 7;
const long double PI = 3.1415926535897932384626433832795028841;
 
ll powmod(ll a,ll b) {ll res=1;a%=MOD;for(;b;b>>=1){if(b&1)res=res*a%MOD;a=a*a%MOD;}return res;}
 
 
const int maxn = 1e5 + 5;
const int maxm = 1e5 + 5;
const int maxk = 1e5 + 5;
 

int main(){
	string s; cin >> s;
	int n = s.size();
	int ans = n;
	for (int i = 0;i < n-1;i++){
		if (s[i] != s[i+1]) ans = min(ans , max(i+1,n-1-(i+1)+1));
	}
	cout << ans << '\n';
}

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