Learning_and_Solving_Problems_Using_Cpp/custom_sort.cpp at main · MohammadFahad1/Learning_and_Solving_Problems_Using_Cpp · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
#include <bits/stdc++.h>
using namespace std;

class Freq
{
public:
    char value;
    int count;
};

bool cmp(Freq a, Freq b)
{
    if (a.count == b.count)
        return a.value < b.value;
    else
        return a.count > b.count;
}

int main()
{
    string s;
    cin >> s;
    Freq f[26];
    for (int i = 0; i < 26; i++)
    {
        f[i].value = char(i + 'a');
        f[i].count = 0;
    }

    for (char c : s)
    {
        f[int(c - 'a')].count++;
    }

    sort(f, f + 26, cmp);

    for (int i = 0; i < 26; i++)
    {
        if (f[i].count != 0)
        {
            for (int j = 0; j < f[i].count; j++)
            {
                cout << f[i].value;
            }
        }
    }

    return 0;
}