Problem p03170 (C++)

Buggy submission (status: Runtime Error):
/*
confirm 0LL and 1LL
confirm cornercases such as 0
confirm times of cin < 10^6
*/
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using P = pair<ll, ll>;
using Pld = pair<ld, ld>;
using Vec = vector<ll>;
using VecP = vector<P>;
using VecB = vector<bool>;
using VecC = vector<char>;
using VecD = vector<ld>;
using VecS = vector<string>;
using VecVec = vector<Vec>;
using Graph = vector<VecP>;
template <typename T> using Vec1 = vector<T>;
template <typename T> using Vec2 = vector<Vec1<T>>;
template <typename T> using Vec3 = vector<Vec2<T>>;
#define REP(i, m, n) for (ll(i) = (m); (i) < (n); ++(i))
#define REPN(i, m, n) for (ll(i) = (m); (i) <= (n); ++(i))
#define REPR(i, m, n) for (ll(i) = (m)-1; (i) >= (n); --(i))
#define REPNR(i, m, n) for (ll(i) = (m); (i) >= (n); --(i))
#define rep(i, n) REP(i, 0, n)
#define repn(i, n) REPN(i, 1, n)
#define repe(i, n) REPN(i, 0, n)
#define repr(i, n) REPR(i, n, 0)
#define repnr(i, n) REPNR(i, n, 1)
#define reper(i, n) REPNR(i, n, 0)
#define all(s) (s).begin(), (s).end()
#define pb push_back
#define mp make_pair
#define fs first
#define sc second
template <typename T> bool chmax(T &a, const T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <typename T> bool chmin(T &a, const T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
template <typename T> ll pow2(const T n) { return (1LL << n); }
template <typename T> void cosp(const T n) { cout << n << ' '; }
template <typename T> void co(const T n) { cout << n << '\n'; }
template <typename T1, typename T2> void co(pair<T1, T2> p) {
  cout << p.fs << ' ' << p.sc << '\n';
}
template <typename T> void co(const Vec1<T> &v) {
  for (T i : v)
    cosp(i);
  cout << '\n';
}
template <typename T> void co(initializer_list<T> v) {
  for (T i : v)
    cosp(i);
  cout << '\n';
}
template <typename T> void ce(const T n) { cerr << n << endl; }
void sonic() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
}
void setp(const ll n) { cout << fixed << setprecision(n); }
const ll INF = 1e9 + 1;
const ll LINF = 1e18 + 1;
const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
const ld PI = acos(-1);
const ld EPS = 1e-11;

int main(void) {
  ll n, k;
  cin >> n >> k;
  Vec a(n);
  rep(i, n) cin >> a[i];

  Vec dp(k + 1);

  repe(i, k) {
    if (i < a[0])
      dp[i] = 1;
    else {
      ll f = 1;
      rep(j, n) if (dp[i - a[j]]) {
        f = 0;
        break;
      }
      dp[i] = f;
    }
  }
  if (!dp[k])
    co("First");
  else
    co("Second");

  return 0;
}


Fixed submission:
/*
confirm 0LL and 1LL
confirm cornercases such as 0
confirm times of cin < 10^6
*/
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using P = pair<ll, ll>;
using Pld = pair<ld, ld>;
using Vec = vector<ll>;
using VecP = vector<P>;
using VecB = vector<bool>;
using VecC = vector<char>;
using VecD = vector<ld>;
using VecS = vector<string>;
using VecVec = vector<Vec>;
using Graph = vector<VecP>;
template <typename T> using Vec1 = vector<T>;
template <typename T> using Vec2 = vector<Vec1<T>>;
template <typename T> using Vec3 = vector<Vec2<T>>;
#define REP(i, m, n) for (ll(i) = (m); (i) < (n); ++(i))
#define REPN(i, m, n) for (ll(i) = (m); (i) <= (n); ++(i))
#define REPR(i, m, n) for (ll(i) = (m)-1; (i) >= (n); --(i))
#define REPNR(i, m, n) for (ll(i) = (m); (i) >= (n); --(i))
#define rep(i, n) REP(i, 0, n)
#define repn(i, n) REPN(i, 1, n)
#define repe(i, n) REPN(i, 0, n)
#define repr(i, n) REPR(i, n, 0)
#define repnr(i, n) REPNR(i, n, 1)
#define reper(i, n) REPNR(i, n, 0)
#define all(s) (s).begin(), (s).end()
#define pb push_back
#define mp make_pair
#define fs first
#define sc second
template <typename T> bool chmax(T &a, const T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
template <typename T> bool chmin(T &a, const T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
template <typename T> ll pow2(const T n) { return (1LL << n); }
template <typename T> void cosp(const T n) { cout << n << ' '; }
template <typename T> void co(const T n) { cout << n << '\n'; }
template <typename T1, typename T2> void co(pair<T1, T2> p) {
  cout << p.fs << ' ' << p.sc << '\n';
}
template <typename T> void co(const Vec1<T> &v) {
  for (T i : v)
    cosp(i);
  cout << '\n';
}
template <typename T> void co(initializer_list<T> v) {
  for (T i : v)
    cosp(i);
  cout << '\n';
}
template <typename T> void ce(const T n) { cerr << n << endl; }
void sonic() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
}
void setp(const ll n) { cout << fixed << setprecision(n); }
const ll INF = 1e9 + 1;
const ll LINF = 1e18 + 1;
const ll MOD = 1e9 + 7;
// const ll MOD = 998244353;
const ld PI = acos(-1);
const ld EPS = 1e-11;

int main(void) {
  ll n, k;
  cin >> n >> k;
  Vec a(n);
  rep(i, n) cin >> a[i];

  Vec dp(k + 1);

  repe(i, k) {
    if (i < a[0])
      dp[i] = 1;
    else {
      ll f = 1;
      rep(j, n) {
        if (a[j] > i)
          break;
        if (dp[i - a[j]]) {
          f = 0;
          break;
        }
      }
      dp[i] = f;
    }
  }
  if (!dp[k])
    co("First");
  else
    co("Second");

  return 0;
}