C_Most_Similar_Words.cpp

//🎃🎃🎃😎😎😁🤓☣☣☣☣☣dark_coder☣☣☣☣☣🤓😁😎😎🎃🎃🎃
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb emplace_back
#define ld long double
#define f(i, a, b) for (int i = a; i < b; i++)
#define mp make_pair
#define pi pair<int, int>
#define vi vector<int>
#define vp vector<pair<int, int>>
#define mi map<int, int>
#define all(a) a.begin(), a.end()
#define ff first
#define ss second
#define endl '\n'
#define el '\n'
#define si(x) (int)(x.size())
#define IOS                  \
    ios::sync_with_stdio(0); \
    cin.tie(0);              \
    cout.tie(0)
#define elapsed_time 1.0 * clock() / CLOCKS_PER_SEC
#define tree vector<vector<int>>
#define PI acos(-1)
#define set_bits __builtin_popcountll
int inf = 99999999999;
const int mod = 1e9 + 7;
const int cmp = 1e18;
#ifndef ONLINE_JUDGE
#define debug(x)       \
    cerr << #x << " "; \
    _print(x);         \
    cerr << endl;
#else
#define debug(x)
#endif
void _print(int t)
{
    cerr << t;
}
void _print(ld t) { cerr << t; }
void _print(string t) { cerr << t; }
void _print(char t) { cerr << t; }
void _print(double t) { cerr << t; }
template <class T, class V>
void _print(pair<T, V> p)
{
    cerr << "{";
    _print(p.ff);
    cerr << ",";
    _print(p.ss);
    cerr << "}";
}
template <class T>
void _print(vector<T> v)
{
    cerr << "[ ";
    for (T i : v)
    {
        _print(i);
        cerr << " ";
    }
    cerr << "]";
}
template <class T>
void _print(set<T> v)
{
    cerr << "[ ";
    for (T i : v)
    {
        _print(i);
        cerr << " ";
    }
    cerr << "]";
}
template <class T>
void _print(multiset<T> v)
{
    cerr << "[ ";
    for (T i : v)
    {
        _print(i);
        cerr << " ";
    }
    cerr << "]";
}
template <class T, class V>
void _print(map<T, V> v)
{
    cerr << "[ ";
    for (auto i : v)
    {
        _print(i);
        cerr << " ";
    }
    cerr << "]";
}

int pow(int a, int b)
{
    int ans = 1;
    while (b > 0)
    {
        if (b & 1)
            ans = ans * a % mod;
        a = a * a % mod;
        b >>= 1;
    }
    return ans;
}
int lcm(int a, int b)
{
    return a / __gcd(a, b) * b;
}
int N = 1000000;
void sieve()
{
    vector<bool> isprime(N + 1, 1);
    isprime[0] = isprime[1] = 0;
    for (int i = 2; i <= N; i++)
    {
        if (isprime[i] && i * i <= N)
        {
            for (int j = i * i; j <= N; j += i)
            {
                isprime[j] = 0;
            }
        }
    }
}
void gv(vi &v, int n)
{
    for (int i = 0; i < n; i++)
    {
        int t;
        cin >> t;
        v.push_back(t);
    }
}
// ================ ================ ================ ================ ================ ================ ================ ================ ================ ================
int dif(string a, string b)
{
    int ans = 0, n = a.length();
    for (int i = 0; i < n; i++)
    {
        int t = abs(a[i] - b[i]);
        ans += t;
    }
    return ans;
}
int solve()
{
    IOS;
    int n, m;
    cin >> n >> m;
    vector<string> v(n);
    for (int i = 0; i < n; i++)
    {
        cin >> v[i];
    }
    int mn = INT_MAX;
    for (int i = 0; i < n; i++)
    {
        for (int j = i + 1; j < n; j++)
        {
            mn = min(mn, dif(v[i], v[j]));
        }
    }

    cout << mn << endl;

    return 0;
}
// ================ ================ ================ ================ ================ ================ ================ ================ ================ ================
signed main()
{
    IOS;
    int t = 1;
    cin >> t;
    while (t--)
    {
        solve();
    }
    return 0;
}