Jakkara

#include <iostream>
#include <algorithm>
#include <vector>
#include <set>

using namespace std;

int main()
{
    vector<long> v;
    set<long> s;
    long sum = 0;
    for (int i = 0; i < 4; i++) {
        long x;
        cin>>x;
        sum += x;
        s.insert(x);
        v.push_back(x);
    }

    sort(v.begin(), v.end());
    if (s.size() == 1) {
        cout<<0<<endl;
    } else if (s.size() == 2) {
        if (v[0] == v[1] && v[2] == v[3]) {
            cout<<2 * (v[2] - v[0])<<endl;
        } else {
            cout<<v[3] - v[0]<<endl;
        }
    } else if (s.size() == 3) {
        if (v[0] == v[1]) {
            cout<<v[2] - v[0] + v[3] - v[0]<<endl;
        } else if (v[2] == v[1]) {
            cout<<v[2] - v[0] + v[3] - v[2]<<endl;
        } else {
            cout<<v[2] - v[0] + v[2] - v[1]<<endl;
        }
    } else {
        long div = sum / 4;
        long ans = abs(v[0] - div) + abs(v[1] - div) + abs(v[2] - div) + abs(v[3] - div);
        div++;
        ans = min(ans, abs(v[0] - div) + abs(v[1] - div) + abs(v[2] - div) + abs(v[3] - div));
        cout<<ans<<endl;
    }
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 3

Verdict: WRONG ANSWER

Test 12

Group: 3

Verdict: WRONG ANSWER

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED