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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     string number;
  6.     cin >> number;
  7.  
  8.     char maxDigit = '0';
  9.     for (char digit : number) {
  10.         if (digit > maxDigit) {
  11.             maxDigit = digit;
  12.         }
  13.     }
  14.  
  15.     cout << maxDigit << endl;
  16.     return 0;
  17. }
Success #stdin #stdout 0.01s 5288KB
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stdin 
Standard input is empty
stdout 
0
https://ideone.com/Ft6A2a
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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