Cho một số nguyên dương S. Hãy tìm ra chữ số lớn nhất trong số nguyên dương S.

$\color{#1fdb91}{\texttt{C}}\color{#0aaec9}{\texttt{+}}\color{#e9418e}{\texttt{+}}$

#include <iostream>
#include <algorithm>

using std::string, std::cin, std::cout;

int main() {
    string s; cin >> s;
    cout <<  *max_element(s.begin(), s.end());
}

$\\$

\begin{array}{c|c|c}\color{#ffd710}{\texttt{\{}} \color{#8655d6}{\texttt{\{}}\ \ \color{#8cdcda}{\text{Daoanhviet96}}\ \ \color{#8655d6}{\texttt{\}}} \color{#ffd710}{\texttt{\}}}\end{array}

`Code:`

#include<bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
 
    string s; cin >> s;
 
    char max_c = '0';
 
    for (char c : s)
        if (c > max_c) max_c = c;
  
    cout << max_c;
 
    return 0;
}

$\text{#KL0112}$