Problem p02707 (C++) — buggy submission, verdict: Runtime Error

/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author champon
 */

#include <bits/stdc++.h>
#include <fstream>
#include <iostream>
#define se cout << "test ok" << endl;
#define sp << " " <<
#define enl "\\n"
using namespace std;
using ll = long long;
using ld = long double;
using vi = vector<int>;
using vii = vector<vector<int>>;
using vl = vector<ll>;
using vll = vector<vector<ll>>;
using vlll = vector<vector<vector<ll>>>;
using vc = vector<char>;
using vcc = vector<vector<char>>;
using pi = pair<int, int>;
using pl = pair<ll, ll>;
ll mod = ll(1e9) + 7;
ll inf = ll(1e18);
void bl(bool b, ostream &out = cout) { out << (b ? "Yes" : "No") << endl; }
void bl2(bool b, ostream &out = cout) { out << (b ? "YES" : "NO") << endl; }
template <typename T> inline bool chmax(T &a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <typename T> inline bool chmin(T &a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
int dx[] = {1, 0, -1, 0, 1, -1, 1, -1};
int dy[] = {0, 1, 0, -1, 1, -1, -1, 1};

#ifndef INCLUDE_DEBUG_HPP
#define INCLUDE_DEBUG_HPP

#include <iostream>
#include <map>
#include <vector>
using namespace std;

namespace dbg {
using ll = long long;

class Debug {
public:
  Debug() {}
  template <typename T> void vd(vector<T> vec);
  template <typename T> void vd2(vector<vector<T>> vec);
  template <typename T> void ad(T *arr, ll n);
  template <typename T, size_t N> void ad2(T (&arr)[N], ll n);
  template <typename T> void md(T mp);
};

template <typename T> void Debug::vd(vector<T> vec) {
  for (auto vv : vec)
    cout << vv << " ";
  cout << endl;
}

template <typename T> void Debug::vd2(vector<vector<T>> vec) {
  for (auto vv : vec) {
    for (auto vvv : vv)
      cout << vvv << " ";
    cout << endl;
  }
}

template <typename T> void Debug::ad(T *arr, ll n) {
  for (int i = 0; i <= n; i++)
    cout << arr[i] << " ";
  cout << endl;
}

template <typename T, size_t N> void Debug::ad2(T (&arr)[N], ll n) {
  for (int i = 0; i <= N; i++)
    for (int j = 0; j <= n; j++)
      cout << arr[i][j] << " ";
  cout << endl;
}

template <typename T> void Debug::md(T mp) {
  cout << "key : value" << endl;
  for (auto const &m : mp)
    cout << m.first << " : " << m.second << endl;
  cout << endl;
}

} // namespace dbg

#endif // INCLUDE_DEBUG_HPP

using dbg::Debug;
Debug debug;

class CManagement {
public:
  void solve(std::istream &in, std::ostream &out) {
    int n;
    in >> n;
    vector<ll> a(n);
    for (int i = 0; i < n - 1; i++) {
      in >> a[i];
    }

    vector<vector<ll>> res(n, vector<ll>());
    for (int i = 0; i < n - 1; i++) {
      res[a[i] - 1].push_back(i);
    }

    for (int i = 0; i < n; i++) {
      out << res[i].size() << enl;
    }
  }
};

int main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  CManagement solver;
  std::istream &in(std::cin);
  std::ostream &out(std::cout);
  solver.solve(in, out);
  return 0;
}


Error: -11

Fixed submission:

/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author champon
 */

#include <bits/stdc++.h>
#include <fstream>
#include <iostream>
#define se cout << "test ok" << endl;
#define sp << " " <<
#define enl "\\n"
using namespace std;
using ll = long long;
using ld = long double;
using vi = vector<int>;
using vii = vector<vector<int>>;
using vl = vector<ll>;
using vll = vector<vector<ll>>;
using vlll = vector<vector<vector<ll>>>;
using vc = vector<char>;
using vcc = vector<vector<char>>;
using pi = pair<int, int>;
using pl = pair<ll, ll>;
ll mod = ll(1e9) + 7;
ll inf = ll(1e18);
void bl(bool b, ostream &out = cout) { out << (b ? "Yes" : "No") << endl; }
void bl2(bool b, ostream &out = cout) { out << (b ? "YES" : "NO") << endl; }
template <typename T> inline bool chmax(T &a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <typename T> inline bool chmin(T &a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
int dx[] = {1, 0, -1, 0, 1, -1, 1, -1};
int dy[] = {0, 1, 0, -1, 1, -1, -1, 1};

#ifndef INCLUDE_DEBUG_HPP
#define INCLUDE_DEBUG_HPP

#include <iostream>
#include <map>
#include <vector>
using namespace std;

namespace dbg {
using ll = long long;

class Debug {
public:
  Debug() {}
  template <typename T> void vd(vector<T> vec);
  template <typename T> void vd2(vector<vector<T>> vec);
  template <typename T> void ad(T *arr, ll n);
  template <typename T, size_t N> void ad2(T (&arr)[N], ll n);
  template <typename T> void md(T mp);
};

template <typename T> void Debug::vd(vector<T> vec) {
  for (auto vv : vec)
    cout << vv << " ";
  cout << endl;
}

template <typename T> void Debug::vd2(vector<vector<T>> vec) {
  for (auto vv : vec) {
    for (auto vvv : vv)
      cout << vvv << " ";
    cout << endl;
  }
}

template <typename T> void Debug::ad(T *arr, ll n) {
  for (int i = 0; i <= n; i++)
    cout << arr[i] << " ";
  cout << endl;
}

template <typename T, size_t N> void Debug::ad2(T (&arr)[N], ll n) {
  for (int i = 0; i <= N; i++)
    for (int j = 0; j <= n; j++)
      cout << arr[i][j] << " ";
  cout << endl;
}

template <typename T> void Debug::md(T mp) {
  cout << "key : value" << endl;
  for (auto const &m : mp)
    cout << m.first << " : " << m.second << endl;
  cout << endl;
}

} // namespace dbg

#endif // INCLUDE_DEBUG_HPP

using dbg::Debug;
Debug debug;

class CManagement {
public:
  void solve(std::istream &in, std::ostream &out) {
    int n;
    in >> n;
    vl a(n);
    for (int i = 0; i < n; i++) {
      in >> a[i];
    }

    vll res(n, vl());
    for (int i = 0; i < n; i++) {
      res[a[i] - 1].push_back(i);
    }

    for (int i = 0; i < n; i++) {
      out << res[i].size() << enl;
    }
  }
};

int main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  CManagement solver;
  std::istream &in(std::cin);
  std::ostream &out(std::cout);
  solver.solve(in, out);
  return 0;
}