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为什么老是wrong啊,水题受不鸟啊#include<iostream>
using namespace std;
int xun(int p)
{
int sum=0;
while(p>0)
{ sum=sum+p%10;
p=p/10;
}
return sum;
}
int main()
{
int n;
while(cin>>n)
{
if(n==0) break;
int s=xun(n);
while(s>=10)
{
s=xun(s);
}
cout<<s<<endl;
}
return 0;
}
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