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  1. #include <iostream>
  2. #include <string>
  3. #include <cmath>
  4. using namespace std;
  5.  
  6. bool check(string num, int len) {
  7.     int sum = 0;
  8.  
  9.     for (int i = 0; i < len; i++) {
  10.         sum += (int) round(
  11.             pow((int) (num[i] - '0'), len)
  12.         );
  13.     }
  14.  
  15.     if (sum == stoi(num)) {
  16.         return true;
  17.     }
  18.  
  19.     return false;
  20. }
  21.  
  22. int main() {
  23.     ios::sync_with_stdio(false);
  24.     cin.tie(nullptr);
  25.  
  26.     for (int i = 153; i < 1000; i++) {
  27.         if (check(to_string(i), 3)) {
  28.             cout << to_string(i) << "\n";
  29.         }
  30.     }
  31.     for (int i = 1000; i < 10000; i++) {
  32.         if (check(to_string(i), 4)) {
  33.             cout << to_string(i) << "\n";
  34.         }
  35.     }
  36.     for (int i = 10000; i < 100000; i++) {
  37.         if (check(to_string(i), 5)) {
  38.             cout << to_string(i) << "\n";
  39.         }
  40.     }
  41.  
  42.     return 0;
  43. }
Success #stdin #stdout 0.03s 5308KB
comments (?)
stdin
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Standard input is empty
stdout
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153
370
371
407
1634
8208
9474
54748
92727
93084
https://ideone.com/xwbUHq
language:
C++ (gcc 8.3)
created:
5 hours ago
visibility:
public

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