Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <utility>
#include <tuple>
#include <string>
#include <cctype>
#include <cstdio>
using i8 = int8_t;
using u8 = uint8_t;
using i16 = int16_t;
using u16 = uint16_t;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;

using f32 = float;
using f64 = double;
using f80 = __float80;
constexpr i64 INF = 1'010'000'000'000'000'017LL;

constexpr i64 MOD = 1'000'000'007LL;

constexpr f64 EPS = 1e-12;

constexpr f64 PI = 3.14159265358979323846;
using namespace std;
#define rep(i, n) for (i64 i = 0; i < (int)(n); i++)
#define FOR(i, m, n) for (i64 i = m; i < n; i++)
#define SORT(x) sort(x.begin(), x.end())
#define REVE(x) reverse(x.begin(), x.end())
#define all(x) (x).begin(), (x).end()
#define fst first
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define pob pop_back
#define sw swap
#define UP(x) transform(x.begin(), x.end(), x.begin(), ::toupper);
#define down(x) transform(x.begin(), x.end(), x.begin(), ::tolower);
using LL = long long;
using ULL = unsigned long long;
template <class T>
inline bool chmax(T &a, T b)
{
    if (a < b)
    {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
inline bool chmin(T &a, T b)
{
    if (a > b)
    {
        a = b;
        return 1;
    }
    return 0;
}

int main()
{
    i64 n, d, k, l, a, b, c;
    string aa, bb, cc;
    cin >> n >> d;
    i64 an[n][d];
    float k1 int k2
        rep(i, n)
    {
        rep(j, d)
        {
            cin >> an[i][j];
        }
    }
    for (i = 1; i < N; i++)
    {
        for (j = i + 1; j <= N; j++)
        {
            for (k = 1; k <= b; k++)
            {
                b += (an[i][k] - an[j][k]) * (an[i][k] - an[j][k]);
                a = sqrt(b);
                if (a * a == b)
                    c++;
            }
        }
    }
    cout << c;
}

Compiler output:
a.cc:12:12: error: 'uint8_t' does not name a type
   12 | using u8 = uint8_t;
      |            ^~~~~~~
a.cc:11:1: note: 'uint8_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
   10 | #include <cstdio>
  +++ |+#include <cstdint>
   11 | using i8 = int8_t;
a.cc:14:13: error: 'uint16_t' does not name a type
   14 | using u16 = uint16_t;
      |             ^~~~~~~~
a.cc:14:13: note: 'uint16_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
a.cc:16:13: error: 'uint32_t' does not name a type
   16 | using u32 = uint32_t;
      |             ^~~~~~~~
a.cc:16:13: note: 'uint32_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
a.cc:18:13: error: 'uint64_t' does not name a type
   18 | using u64 = uint64_t;
      |             ^~~~~~~~
a.cc:18:13: note: 'uint64_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
a.cc: In function 'int main()':
a.cc:73:14: error: expected initializer before 'int'
   73 |     float k1 int k2
      |              ^~~
a.cc:74:13: error: 'i' was not declared in this scope
   74 |         rep(i, n)
      |             ^
a.cc:31:35: note: in definition of macro 'rep'
   31 | #define rep(i, n) for (i64 i = 0; i < (int)(n); i++)
      |                                   ^
a.cc:81:21: error: 'N' was not declared in this scope
   81 |     for (i = 1; i < N; i++)
      |                     ^
a.cc:83:14: error: 'j' was not declared in this scope
   83 |         for (j = i + 1; j <= N; j++)
      |              ^
a.cc:88:21: error: 'sqrt' was not declared in this scope
   88 |                 a = sqrt(b);
      |                     ^~~~