#include <iostream>
#include <algorithm>
using namespace std;

int main() {
    int digits[] = {5, 6, 2, 9, 4, 1};
    int n = sizeof(digits)/sizeof(digits[0]);

    // 对数组进行降序排序
    sort(digits, digits+n, greater<int>());

    // 构建最大三位数
    int maxNum = digits[0]*100 + digits[1]*10 + digits[2];
    cout << "The largest 3-digit number is: " << maxNum << endl;
    return 0;
}