题解 | #数字之和#

#include <cstdio>
using namespace std;
int sumnum(int n){
    int sum=0;
    while (n>0){
        sum=sum+n%10;
        n=n/10;
    }
    return sum;
}
int main(){
    int arr;
    while (scanf("%d",&arr)!=EOF){
        printf("%d %d\n", sumnum(arr), sumnum(arr*arr));
    }
}