题解 | #小红的抛弃后缀#
小红的抛弃后缀
https://ac.nowcoder.com/acm/problem/271172
#include <bits/stdc++.h>
#define ll long long
using namespace std;
int main()
{
string s;
cin>>s;
ll len=s.size();
ll num=0;
ll res=0;
for(ll i=0;i<len;i++)
{
num=num*10+s[i]-'0';
if(num%9==0)
res++;
else
num=num%9;
}
cout<<res;
return 0;
}
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