The Biggest Water Problem
The Biggest Water Problem
https://ac.nowcoder.com/acm/problem/15173
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int bian(int x)
{
int sum=0;
while(x)
{
sum+=x%10;
x/=10;
}//求和
if(sum<10) return sum;
else return bian(sum);//不符合就递归
}
int main()
{
int n,sum=0;
cin>>n;
cout<<bian(n)<<endl;
}
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