```cpp 输入s,n; k=1,ans=1; 循环 判断是否是连续; 输出; #include<bits/stdc++.h> using namespace std; int main(){ int n; string s; cin>>n;cin>>s; int k=1,ans=1; for(int i=1;i<n;i++){ if(s[i]==s[i-1]+1)k++; else{ ans=max(ans,k);k=1;}} cout<<ans; return 0;}
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