Witch game

#include <iostream>

typedef long long llong;

const int MAX_PLAYER = 100005;

using namespace std;

llong acc [MAX_PLAYER], acccnt [MAX_PLAYER];
llong choose [MAX_PLAYER][4];

int main () {
  llong playerc;
  cin >> playerc;

  for (int i = 1; i <= playerc; i++) {
    cin >> acc[i];
    acccnt[acc[i]]++;
  }

  llong nwtc = playerc * (playerc - 2);
  
  for (int i = 1; i <= playerc; i++) {
    if (acc[acc[i]] == i) {
      if (i < acc[i]) {
        nwtc -= (playerc - 2);
      }
      nwtc -= (acccnt[i] - 1) * (acccnt[i]) / 2;
    } else {
      nwtc -= (acccnt[i] * (acccnt[i] + 1)) / 2;
    }

    if (acc[acc[acc[i]]] == i && i < acc[i] && i < acc[acc[i]]) {
      nwtc++;
    }
  }

  choose[0][0] = 1;
  for (int i = 1; i <= playerc; i++) {
    choose[i][0] = 1;
    for (int j = 1; j <= 3; j++) {
      choose[i][j] = choose[i - 1][j - 1] + choose[i - 1][j];
    }
  }

  cout << choose[playerc][3] - nwtc << 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: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED