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#include<iostream> using namespace std; main() { string s;cin>>s; int n=s.size(),cnt=0; for(int i=0;i<n/2;i++) { if(s!=s)cnt++; } cout<<(cnt==1||cnt==0&&n%2==1?"YES":"NO")<<endl; }

#include<cstdio> #include<cstring> #include<algorithm> #include<cctype> #include<ctime> #include<cstdlib> #include<string> #include<queue> #include<cmath> #include<set> #include<map> #include<bitset> #include<vector> #define rep(x,a,b) for (int x=int(a);x<=(int)(b);x++) #define drp(x,a,b) for (int x=int(a);x>=(int)(b);x--) #define...

#include <bits/stdc++.h> #define MAXN (1000000) #define MAXM (6) #define mod (1000000007) #define ll...

import java.util.ArrayList; import java.util.Scanner; /* 4 10 2 4 6 8 4 10 2 9...

#include<cstdio> #include<cstdlib> #include<cmath> #include<algorithm> #include<cstring> using namespace std; #define maxn 1005 int x,y; int n; long long area(int...

#include <bits/stdc++.h> using namespace std; struct Time { int i; double v; }; const int...

#include<bits/stdc++.h> using namespace std; int main() { string a,b; cin>>a>>b; int l=a.length(); for(int i=0;i<l;i++) { ...

#include <stdio.h> int ans,l,i; int main() { char ch; scanf("%s",ch); for( ; ch; i++) { l++; if(ch=='V' &&...

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