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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. const int TEN = 10;
  6.  
  7. bool isDigit(char c) {
  8.     return '0' <= c && c <= '9';
  9. }
  10.  
  11. void countDigits(int fr[], char text[]) {
  12.     int textLen = strlen(text);
  13.     for (int i = 0; i < textLen; ++i) {
  14.         if (isDigit(text[i])) {
  15.             ++fr[text[i] - '0'];
  16.         }
  17.     }
  18. }
  19.  
  20. int constructNum(int fr[]) {
  21.     int biggerNum = 0;
  22.     for (int i = TEN - 1; i >= 0; --i) {
  23.         for (int j = 1; j <= fr[i]; ++j) {
  24.             biggerNum = biggerNum * TEN + i;
  25.         }
  26.     }
  27.     return biggerNum;
  28. }
  29.  
  30. int biggerNumber(char text[]) {
  31.     int fr[TEN] = {0};
  32.     countDigits(fr, text);
  33.     return constructNum(fr);
  34. }
  35.  
  36. int main() {
  37.     char text[100];
  38.     cin >> text;
  39.     cout << biggerNumber(text);
  40.     return 0;
  41. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/liWqVn
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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