Problem p03743 (C++)

Buggy submission (status: Runtime Error):
/* ---------- STL Libraries ---------- */

// IO library
#include <cstdio>
#include <fstream>
#include <iomanip>
#include <ios>
#include <iostream>

// algorithm library
#include <algorithm>
#include <cmath>
#include <numeric>

// container library
#include <array>
#include <bitset>
#include <deque>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>

/* ---------- Namespace ---------- */

using namespace std;

/* ---------- Type Abbreviation ---------- */

template <typename T> using V = vector<T>;
template <typename T, typename U> using P = pair<T, U>;
template <typename T> using PQ = priority_queue<T>;
template <typename T> using GPQ = priority_queue<T, vector<T>, greater<T>>;

using ll = long long;

#define fst first
#define snd second
#define pb push_back
#define mp make_pair
#define mt make_tuple

/* ---------- conversion ---------- */

#define INT(c) static_cast<int>(c)
#define CHAR(n) static_cast<char>(n)
#define LL(n) static_cast<ll>(n)
#define DOUBLE(n) static_cast<double>(n)

/* ---------- container ---------- */

#define ALL(v) (v).begin(), (v).end()
#define SIZE(v) (LL((v).size()))

#define FIND(v, k) (v).find(k) != (v).end()
#define VFIND(v, k) find(ALL(v), k) != (v).end()

#define gsort(b, e) sort(b, e, greater<decltype(*b)>())
#define SORT(v) sort(ALL(v))
#define GSORT(v) gsort(ALL(v))

/* ---------- repetition ---------- */

#define FOR(i, a, b) for (ll i = (a); i <= (b); ++i)
#define RFOR(i, a, b) for (ll i = (a); i >= (b); --i)

/* ----------- debug ---------- */

template <class T> ostream &operator<<(ostream &os, vector<T> v) {
  os << "[";
  for (auto vv : v)
    os << vv << ",";
  return os << "]";
}

template <class T> ostream &operator<<(ostream &os, set<T> v) {
  os << "[";
  for (auto vv : v)
    os << vv << ",";
  return os << "]";
}

template <class L, class R> ostream &operator<<(ostream &os, pair<L, R> p) {
  return os << "(" << p.fst << "," << p.snd << ")";
}

/* ---------- Constants ---------- */

// const ll MOD = 1e9 + 7;
// const int INF = 1 << 25;
// const ll INF = 1LL << 50;
// const double PI = acos(-1);
// const double EPS = 1e-10;
// const ll dx[4] = {0, -1, 1, 0};
// const ll dy[4] = {-1, 0, 0, 1};

/* ---------- Short Functions ---------- */

template <typename T> T sq(T a) { return a * a; }

template <typename T> T gcd(T a, T b) {
  if (a > b)
    return gcd(b, a);
  return a == 0 ? b : gcd(b % a, a);
}

template <typename T, typename U> T mypow(T b, U n) {
  if (n == 0)
    return 1;
  if (n == 1)
    return b /* % MOD */;
  if (n % 2 == 0) {
    return mypow(sq(b) /* % MOD */, n / 2);
  } else {
    return mypow(b, n - 1) * b /* % MOD */;
  }
}

ll pcnt(ll b) { return __builtin_popcountll(b); }

/* v-v-v-v-v-v-v-v-v Main Part v-v-v-v-v-v-v-v-v */

#define DEBUG

void solve() {
  ll N, D;
  cin >> N >> D;

  V<ll> d(N + 1), dis(N + 1, D);
  FOR(i, 1, N) {
    cin >> d[i];
    dis[i] = min(abs(dis[i - 1] - d[i]), dis[i - 1]);
  }

  // cout << dis << endl;

  V<ll> min_out(N + 1, (dis[N] == 0));
  RFOR(i, N, 1) {
    if (d[i] >= min_out[i] * 2) {
      min_out[i - 1] = min_out[i];
    } else {
      min_out[i - 1] = min_out[i] + d[i];
    }
  }

  // cout << min_out << endl;

  ll Q;
  cin >> Q;
  FOR(_, 1, Q) {
    ll q;
    cin >> q;

    cout << (dis[q - 1] >= min_out[q] ? "YES" : "NO") << endl;
  }
  return;
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  // cout << fixed << setprecision(10);

#ifdef DEBUG
  freopen("input.txt", "r", stdin);
  int num;
  cin >> num;
  FOR(_, 1, num) {
    cout << "++++++++++++++++++++" << endl;
    solve();
  }
#else
  solve();
#endif

  return 0;
}


Fixed submission:
/* ---------- STL Libraries ---------- */

// IO library
#include <cstdio>
#include <fstream>
#include <iomanip>
#include <ios>
#include <iostream>

// algorithm library
#include <algorithm>
#include <cmath>
#include <numeric>

// container library
#include <array>
#include <bitset>
#include <deque>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>

/* ---------- Namespace ---------- */

using namespace std;

/* ---------- Type Abbreviation ---------- */

template <typename T> using V = vector<T>;
template <typename T, typename U> using P = pair<T, U>;
template <typename T> using PQ = priority_queue<T>;
template <typename T> using GPQ = priority_queue<T, vector<T>, greater<T>>;

using ll = long long;

#define fst first
#define snd second
#define pb push_back
#define mp make_pair
#define mt make_tuple

/* ---------- conversion ---------- */

#define INT(c) static_cast<int>(c)
#define CHAR(n) static_cast<char>(n)
#define LL(n) static_cast<ll>(n)
#define DOUBLE(n) static_cast<double>(n)

/* ---------- container ---------- */

#define ALL(v) (v).begin(), (v).end()
#define SIZE(v) (LL((v).size()))

#define FIND(v, k) (v).find(k) != (v).end()
#define VFIND(v, k) find(ALL(v), k) != (v).end()

#define gsort(b, e) sort(b, e, greater<decltype(*b)>())
#define SORT(v) sort(ALL(v))
#define GSORT(v) gsort(ALL(v))

/* ---------- repetition ---------- */

#define FOR(i, a, b) for (ll i = (a); i <= (b); ++i)
#define RFOR(i, a, b) for (ll i = (a); i >= (b); --i)

/* ----------- debug ---------- */

template <class T> ostream &operator<<(ostream &os, vector<T> v) {
  os << "[";
  for (auto vv : v)
    os << vv << ",";
  return os << "]";
}

template <class T> ostream &operator<<(ostream &os, set<T> v) {
  os << "[";
  for (auto vv : v)
    os << vv << ",";
  return os << "]";
}

template <class L, class R> ostream &operator<<(ostream &os, pair<L, R> p) {
  return os << "(" << p.fst << "," << p.snd << ")";
}

/* ---------- Constants ---------- */

// const ll MOD = 1e9 + 7;
// const int INF = 1 << 25;
// const ll INF = 1LL << 50;
// const double PI = acos(-1);
// const double EPS = 1e-10;
// const ll dx[4] = {0, -1, 1, 0};
// const ll dy[4] = {-1, 0, 0, 1};

/* ---------- Short Functions ---------- */

template <typename T> T sq(T a) { return a * a; }

template <typename T> T gcd(T a, T b) {
  if (a > b)
    return gcd(b, a);
  return a == 0 ? b : gcd(b % a, a);
}

template <typename T, typename U> T mypow(T b, U n) {
  if (n == 0)
    return 1;
  if (n == 1)
    return b /* % MOD */;
  if (n % 2 == 0) {
    return mypow(sq(b) /* % MOD */, n / 2);
  } else {
    return mypow(b, n - 1) * b /* % MOD */;
  }
}

ll pcnt(ll b) { return __builtin_popcountll(b); }

/* v-v-v-v-v-v-v-v-v Main Part v-v-v-v-v-v-v-v-v */

// #define DEBUG

void solve() {
  ll N, D;
  cin >> N >> D;

  V<ll> d(N + 1), dis(N + 1, D);
  FOR(i, 1, N) {
    cin >> d[i];
    dis[i] = min(abs(dis[i - 1] - d[i]), dis[i - 1]);
  }

  // cout << dis << endl;

  V<ll> min_out(N + 1, (dis[N] == 0));
  RFOR(i, N, 1) {
    if (d[i] >= min_out[i] * 2) {
      min_out[i - 1] = min_out[i];
    } else {
      min_out[i - 1] = min_out[i] + d[i];
    }
  }

  // cout << min_out << endl;

  ll Q;
  cin >> Q;
  FOR(_, 1, Q) {
    ll q;
    cin >> q;

    cout << (dis[q - 1] >= min_out[q] ? "YES" : "NO") << endl;
  }
  return;
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  // cout << fixed << setprecision(10);

#ifdef DEBUG
  freopen("input.txt", "r", stdin);
  int num;
  cin >> num;
  FOR(_, 1, num) {
    cout << "++++++++++++++++++++" << endl;
    solve();
  }
#else
  solve();
#endif

  return 0;
}