Daffodils (day 78)

1： subject

 Spring is the season of flowers , Narcissus is one of the most charming representatives , There's a narcissus number in math , It's defined as ：

“ Narcissistic number ” A three digit number , The cube sum of its digits is equal to itself , such as ：153=13+53+33.

 Now it's required to output all the data in  m  and  n  The number of daffodils in the range .

 Input format 
 Input contains multiple sets of test data .

 Each group of data occupies one row , Contains two integers  m  and  n.

 The last line  0 0  End of input .

 Output format 
 Output one line of answers for each group of data , Output from small to large all located in  [m,n]  The number of daffodils in the range , The numbers are separated by spaces , If not, output  no.

 Data range 
100≤m≤n≤999,
 The input can contain at most  10  Group data .

 sample input ：
100 120 
300 380 
0 0
 sample output ：
no
370 371
 difficulty ： Simple 
 when / Empty limit ：1s / 64MB
 Total number of passes ：1197
 Total attempts ：1926
 source ： Machine test questions for postgraduate entrance examination of Central South University 
 Algorithm tags 

2： Code implementation

#include <iostream>
#include <cstring>
#include <algorithm>

using namespace std;

bool check(int x)
{
    
    int sum = 0, y = x;
    while (x)
    {
    
        int t = x % 10;
        x /= 10;
        sum += t * t * t;
    }
    return sum == y;
}

int main()
{
    
    int m, n;
    while (cin >> m >> n, m)
    {
    
        int cnt = 0;
        for (int i = m; i <= n; i ++ )
            if (check(i))
            {
    
                cout << i << ' ';
                cnt ++ ;
            }
        if (!cnt) cout << "no";
        cout << endl;
    }

    return 0;
}