C++ :
#include<bits/stdc++.h> using namespace std; string s; int n,ans,tmp=1,t,a[95]; char c; int main() { cin>>n>>s; s=s+'a'; for(int i=0;i<s.size();i++) if(s[i]==s[i+1]) tmp++; else{ if(tmp>ans) ans=tmp,t=i; tmp=1; } cout<<ans<<endl<<s[t]; return 0; }
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