题解 | #The BiggestWaterProblem#
The Biggest Water Problem
https://www.nowcoder.com/practice/435aa556e093463891f6da7d322140a4
#include <iostream> using namespace std; int main() { int n; cin>>n; while(n>9){ string a = to_string(n); n=0; for(int i=0;i<a.length();i++){ n += a[i]-'0'; } } cout<<n; }