Problem p02603 (C++) — buggy submission, verdict: Runtime Error

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
// #include <boost/multiprecision/cpp_int.hpp>
//
// using namespace boost::multiprecision;
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,
             tree_order_statistics_node_update>
    ordered_set;

/*** Typedef ***/
typedef long long ll;
typedef long long int lli;
typedef unsigned long long ull;
typedef long double ld;

// typedef    unordered_set<ll>   usll;
// typedef    unordered_multiset<ll>   umsll;

/*** Loops ***/
#define ffit(i, dat)                                                           \\
  for (__typeof(dat.begin()) i = dat.begin(); i != dat.end(); ++i)
#define ff1(i, a, b) for (ll i = a; i < b; i++)
#define ff2(i, a, b) for (ll i = b - 1; i >= a; i--)
#define ff3(i, a, b, m) for (ll i = a; i < b; i += m)
#define ipar(ar, n)                                                            \\
  ll ar[n];                                                                    \\
  ff1(i, 0, n) cin >> ar[i];
#define opar(ar, n) ff1(i, 0, n) cout << ar[i] << " ";
#define foRev(num) for (ll i = num - 1; i >= 0; i--)
#define forIn(arr, num)                                                        \\
  for (ll i = 0; i < num; i++)                                                 \\
    sc1(arr[i]);
#define forIn1(arr, num)                                                       \\
  for (ll i = 1; i <= num; i++)                                                \\
    sc1(arr[i]);
#define vpnt(ans)                                                              \\
  for (ll i = 0; i < ans.size(); i++)                                          \\
    cout << ans[i] << (i + 1 < ans.size() ? ' ' : '\\n');
#define apnt(arr, num)                                                         \\
  for (ll i = 0; i < num; i++)                                                 \\
    cout << arr[i] << (i + 1 < num ? ' ' : '\\n');

/*** Define Values ***/

#define PI acos(-1.0)
#define eps 1e-7
#define size1 15

/*** STLs ***/
#define cu continue
#define br break
#define rsz resize
#define ins insert
#define ft front
#define bk back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define ff first
#define ss second
#define mp make_pair
#define mem(name, value) memset(name, value, sizeof(name))
#define MN3(n1, n2, n3) min(n1, min(n2, n3))
#define MN4(n1, n2, n3, n4) min(n1, min(n2, min(n3, n4)))
#define MX3(n1, n2, n3) max(n1, max(n2, n3))
#define MX4(n1, n2, n3, n4) max(n1, max(n2, max(n3, n4)))
#define mxar(a, n) *max_element(a, a + n)
#define mnar(a, n) *min_element(a, a + n)
#define arr_sm(a, n) accumulate(a, a + n, 0)
#define vc_sm(ve) accumulate(ve.begin(), ve.end(), 0)
#define mx_vc(ve) *max_element(ve.begin(), ve.end())
#define mn_vc(ve) *min_element(ve.begin(), ve.end())
// #define endl " \\n"

/*** STLs ***/
typedef vector<ll> vll;
#define vvll vector<vll>
typedef set<ll> sll;
typedef multiset<ll> msll;
// typedef multimap <ll> mpll;
typedef queue<ll> qll;
typedef map<ll, ll> mll;
typedef pair<ll, ll> pll;
typedef vector<pair<ll, ll>> vpll;
typedef priority_queue<pair<ll, ll>> pqpll;
#define maxpq priority_queue<int>
#define minpq priority_queue<int, vector<int>, greater<int>>
#define ml unordered_map<ll, ll>
/// typedef    unordered_multiset<int>   umsi;
typedef unordered_set<ll> us;

/// vector<vector<int>> v(10, vector<int>(20,500)); 2d vector initialization. of
/// 10 rows and 20 columns, with value 500.

/*** Sorts ***/
#define czero(n)                                                               \\
  __builtin_popcountll(                                                        \\
      n) // count the number of 1's in the bit representation of a number
#define cenzero(n)                                                             \\
  __builtin_ctzll(n) // count the number of zereos from the end of the bit
                     // representation of a number until a 1
#define countbegzero(n) __builtin_clzxll(n)
#define checkparity(n)                                                         \\
  __builtin_parityll(n) // checks whether the number of bits are even or odd
#define all(v) (v).begin(), (v).end()
#define rev(v) reverse(all(v))
#define srt(v) sort(all(v))
#define srtgrt(v) sort(all(v), greater<ll>())
#define prsrt greater<pair<int, int>>()
/*** Some Prints ***/
#define ip(n)                                                                  \\
  ll n;                                                                        \\
  cin >> n;
#define ipp(n, k)                                                              \\
  ll n;                                                                        \\
  cin >> n;                                                                    \\
  ll k;                                                                        \\
  cin >> k;
#define ip3(n, m, k)                                                           \\
  ll n;                                                                        \\
  cin >> n;                                                                    \\
  ll m;                                                                        \\
  cin >> m;                                                                    \\
  ll k;                                                                        \\
  cin >> k;
#define kl '\\n'
#define no cout << "NO" << '\\n'
#define yes cout << "YES" << '\\n'
#define case cout << "Case " << t++ << ": ";
// #define ps(x,y)         fixed<<setprecision(y)<<x
#define inf 1e18
#define dbg(x) cout << '>' << #x << ':' << x << kl;
#define trc(x) cerr << #x << ": " << x << kl
#define trc2(x, y) cerr << #x << ": " << x << " | " << #y << ": " << y << kl
#define trc3(x, y, z)                                                          \\
  cerr << #x << ":" << x << " | " << #y << ": " << y << " | " << #z << ": "    \\
       << z << kl
#define trc4(a, b, c, d)                                                       \\
  cerr << #a << ": " << a << " | " << #b << ": " << b << " | " << #c << ": "   \\
       << c << " | " << #d << ": " << d << kl
#define trc5(a, b, c, d, e)                                                    \\
  cerr << #a << ": " << a << " | " << #b << ": " << b << " | " << #c << ": "   \\
       << c << " | " << #d << ": " << d << " | " << #e << ": " << e << kl
#define trc6(a, b, c, d, e, f)                                                 \\
  cerr << #a << ": " << a << " | " << #b << ": " << b << " | " << #c << ": "   \\
       << c << " | " << #d << ": " << d << " | " << #e << ": " << e << " | "   \\
       << #f << ": " << f << kl
#define w(x)                                                                   \\
  ll x;                                                                        \\
  cin >> x;                                                                    \\
  while (x--)
#define go(i, a) for (auto &i : a)
#define go1(it, v) for (auto it = v.begin(); it != v.end(); ++it)
#define mk(arr, n, type) type *arr = new type[n];
#define sz(obj) (int(obj.size()))
#define ipve(vc, n)                                                            \\
  vll vc(n);                                                                   \\
  ff1(i, 0, n) { cin >> vc[i]; }
#define ipvc(vc, n)                                                            \\
  vll vc;                                                                      \\
  ff1(i, 0, n) {                                                               \\
    ip(x);                                                                     \\
    vc.pb(x);                                                                  \\
  }
#define depressed()                                                            \\
  ios_base::sync_with_stdio(false);                                            \\
  cin.tie(NULL);                                                               \\
  cout.tie(NULL)
// bool ans = all_of(arr, arr + 6, [](int x) {return x & 1; } );
const double pi = 3.141592653589793238460;
bool isptsquare(long double x) {
  long double sr = sqrt(x);
  return ((sr - floor(sr)) == 0);
}

ll facts(ll n, ll mod) {
  ll prod = 1;
  for (ll i = 1; i <= n; i++) {
    prod = (prod * i) % mod;
  }
  return prod;
}

ll binpow(ll a, ll b, ll mod) {
  ll ans = 1;
  while (b) {
    if (b & 1)
      ans *= a;
    a *= a;
    ans %= mod;
    a %= mod;
    b /= 2;
  }
  return ans;
}
ll mod = 1e9 + 7;
vector<ll> factors(ll n) { // returns all factors of a given number
  ll lim = sqrt(n);
  vector<ll> f;
  for (int i = 1; i <= lim; i++) {
    if (n % i == 0) {
      f.push_back(i);
      f.push_back(n / i);
      if (i * i == n) {
        f.pop_back();
      }
    }
  }
  return f;
}

ll ceilAB(ll a, ll b) { return (a + b - 1) / b; }
ll bigmod(ll n, ll pow) {
  if (pow == 0)
    return 1;
  if (pow == 1)
    return n % mod;

  ll ans = bigmod(n, pow / 2);
  ans = (ans * ans) % mod;

  if (pow % 2 == 1) {
    ans = (ans * n) % mod;
  }
  return ans % mod;
}

const int mxn = 1e3;

ll fact[mxn + 1];
void calcfac(ll n, ll mod = 2e18) {
  fact[0] = 1;
  for (int i = 1; i <= n; ++i) {
    fact[i] = fact[i - 1] * i;
    fact[i] %= mod;
  }
}

ll nCr(ll p, ll q, ll mod = 2e18) {
  ll val = fact[p];
  ll invfact = fact[q] * fact[p - q];
  val %= mod;
  invfact %= mod;
  val *= binpow(invfact, mod - 2, mod);
  return val % mod;
}

ll nPr(ll p, ll q, ll mod = 2e18) {
  ll val = nCr(p, q, mod);
  val *= fact[q];
  val %= mod;
  return val;
}

bool isprime(ll n) {
  // Corner cases
  if (n <= 1)
    return false;
  if (n <= 3)
    return true;
  if (n % 2 == 0 || n % 3 == 0)
    return false;

  for (int i = 5; i * i <= n; i = i + 6)
    if (n % i == 0 || n % (i + 2) == 0)
      return false;

  return true;
}
ll power(ll x, ll y) {
  ll temp;
  if (y == 0)
    return 1;
  temp = power(x, y / 2);
  if (y % 2 == 0)
    return temp * temp;
  else {
    if (y > 0)
      return (x * temp * temp);
    else
      return ((temp * temp) / x);
  }
}

// ll pmod(ll a,ll b){ll res=1;a%=mod;assert(b>=0);for(; b;
// b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;} ll expo(ll x, ll y){ ll
// res = 1; x = x % mod;  while (y > 0) { if (y & 1)res = (res*x) % mod; y =
// y>>1;x = (x*x) % mod;}return res;} void matmul(ll a[][2], ll b[][2]) { ll
// tmp[2][2]; for(int i=0; i<2; i++) { for(int j=0; j<2; j++) { tmp[i][j] = 0;
// for(int k=0; k<2; k++) tmp[i][j] = (tmp[i][j] + a[i][k]*b[k][j]) % mod; }}
// for(int i=0; i<2; i++) for(int j=0; j<2; j++) a[i][j] = tmp[i][j]; } ll
// fibo(int n)    // returns nth fibonacci number, also S(n) = f(n+2)-1 { if(n
//== 0) return 0; else if(n == 1) return 1; ll T[2][2] = { {0, 1} , {1, 1} }; ll
//res[2][2] = { {1, 0}, {0,1} }; n--; while(n) { if(n & 1) matmul(res, T); n >>=
//1; matmul(T, T); } return res[1][1]; }

ll cbtr(ll n, ll m) {
  ll sm = 1;
  ff1(i, 1, m + 1) {
    sm *= (n - i + 1);
    sm /= i;
  }
  return sm;
}
// string a="cdefghijklmnopqrstuvwxyz";
ld f(ld n) {
  ld sm = 1;
  ff1(i, 1, n + 1) { sm *= i; }
  return sm;
}
ld pc(ld n, ld k) {
  ld sm = f(n) / f(n - k);
  return sm;
}
vll prime;
void seive(ll n) {
  prime.resize(n + 1, 1);
  iota(prime.begin(), prime.end(), 0);
  prime[0] = 0, prime[1] = 1;
  for (int i = 2; i * i <= n; i++)
    if (prime[i] == i)
      for (int j = i * i; j <= n; j += i)
        prime[j] = i;
}
map<ll, ll> prime_factor(ll n) {
  map<ll, ll> ret;
  for (ll i = 2; i * i <= n; i++) {
    while (n % i == 0) {
      ret[i]++;
      n /= i;
    }
  }
  if (n != 1)
    ret[n] = 1;
  return ret;
}
bool p2(ll n) {
  if (n == 0)
    return false;

  return (ceil(log2(n)) == floor(log2(n)));
}
#define cer                                                                    \\
  cerr << "Time : " << 1000 * ((double)clock()) / (double)CLOCKS_PER_SEC       \\
       << "ms\\n";
#define ps(x, y) fixed << setprecision(y) << x
ll modInverse(ll n, ll m) { return binpow(n, m - 2, m); }
bool cmp(pll a, pll b) {
  if (a.ss == b.ss) {
    return a.ff > b.ff;
  }
  return a.ff > b.ff;
}

void fun() {
  ip(n);
  ipvc(a, n);
  vll b, c;
  ff1(i, 0, n - 1) {
    if (a[i + 1] > a[i]) {
      c.pb(a[i]);
      c.pb(a[i + 1]);
    }
  }
  ll sm = 1000;
  // go(i,c) cout<<i<<kl;
  ff1(i, 0, sz(c)) {
    ll k = sm / c[i];
    sm -= k * c[i];
    sm += k * c[i + 1];
    i++;
  }
  cout << sm;
}

int main() {
  depressed();
  ll t = 1;
  // cin>>t;
  while (t--) {
    fun();
  }
  // cer;
  return 0;
}


Error: WA

Fixed submission:

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
// #include <boost/multiprecision/cpp_int.hpp>
//
// using namespace boost::multiprecision;
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,
             tree_order_statistics_node_update>
    ordered_set;

/*** Typedef ***/
typedef long long ll;
typedef long long int lli;
typedef unsigned long long ull;
typedef long double ld;

// typedef    unordered_set<ll>   usll;
// typedef    unordered_multiset<ll>   umsll;

/*** Loops ***/
#define ffit(i, dat)                                                           \\
  for (__typeof(dat.begin()) i = dat.begin(); i != dat.end(); ++i)
#define ff1(i, a, b) for (ll i = a; i < b; i++)
#define ff2(i, a, b) for (ll i = b - 1; i >= a; i--)
#define ff3(i, a, b, m) for (ll i = a; i < b; i += m)
#define ipar(ar, n)                                                            \\
  ll ar[n];                                                                    \\
  ff1(i, 0, n) cin >> ar[i];
#define opar(ar, n) ff1(i, 0, n) cout << ar[i] << " ";
#define foRev(num) for (ll i = num - 1; i >= 0; i--)
#define forIn(arr, num)                                                        \\
  for (ll i = 0; i < num; i++)                                                 \\
    sc1(arr[i]);
#define forIn1(arr, num)                                                       \\
  for (ll i = 1; i <= num; i++)                                                \\
    sc1(arr[i]);
#define vpnt(ans)                                                              \\
  for (ll i = 0; i < ans.size(); i++)                                          \\
    cout << ans[i] << (i + 1 < ans.size() ? ' ' : '\\n');
#define apnt(arr, num)                                                         \\
  for (ll i = 0; i < num; i++)                                                 \\
    cout << arr[i] << (i + 1 < num ? ' ' : '\\n');

/*** Define Values ***/

#define PI acos(-1.0)
#define eps 1e-7
#define size1 15

/*** STLs ***/
#define cu continue
#define br break
#define rsz resize
#define ins insert
#define ft front
#define bk back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define ff first
#define ss second
#define mp make_pair
#define mem(name, value) memset(name, value, sizeof(name))
#define MN3(n1, n2, n3) min(n1, min(n2, n3))
#define MN4(n1, n2, n3, n4) min(n1, min(n2, min(n3, n4)))
#define MX3(n1, n2, n3) max(n1, max(n2, n3))
#define MX4(n1, n2, n3, n4) max(n1, max(n2, max(n3, n4)))
#define mxar(a, n) *max_element(a, a + n)
#define mnar(a, n) *min_element(a, a + n)
#define arr_sm(a, n) accumulate(a, a + n, 0)
#define vc_sm(ve) accumulate(ve.begin(), ve.end(), 0)
#define mx_vc(ve) *max_element(ve.begin(), ve.end())
#define mn_vc(ve) *min_element(ve.begin(), ve.end())
// #define endl " \\n"

/*** STLs ***/
typedef vector<ll> vll;
#define vvll vector<vll>
typedef set<ll> sll;
typedef multiset<ll> msll;
// typedef multimap <ll> mpll;
typedef queue<ll> qll;
typedef map<ll, ll> mll;
typedef pair<ll, ll> pll;
typedef vector<pair<ll, ll>> vpll;
typedef priority_queue<pair<ll, ll>> pqpll;
#define maxpq priority_queue<int>
#define minpq priority_queue<int, vector<int>, greater<int>>
#define ml unordered_map<ll, ll>
/// typedef    unordered_multiset<int>   umsi;
typedef unordered_set<ll> us;

/// vector<vector<int>> v(10, vector<int>(20,500)); 2d vector initialization. of
/// 10 rows and 20 columns, with value 500.

/*** Sorts ***/
#define czero(n)                                                               \\
  __builtin_popcountll(                                                        \\
      n) // count the number of 1's in the bit representation of a number
#define cenzero(n)                                                             \\
  __builtin_ctzll(n) // count the number of zereos from the end of the bit
                     // representation of a number until a 1
#define countbegzero(n) __builtin_clzxll(n)
#define checkparity(n)                                                         \\
  __builtin_parityll(n) // checks whether the number of bits are even or odd
#define all(v) (v).begin(), (v).end()
#define rev(v) reverse(all(v))
#define srt(v) sort(all(v))
#define srtgrt(v) sort(all(v), greater<ll>())
#define prsrt greater<pair<int, int>>()
/*** Some Prints ***/
#define ip(n)                                                                  \\
  ll n;                                                                        \\
  cin >> n;
#define ipp(n, k)                                                              \\
  ll n;                                                                        \\
  cin >> n;                                                                    \\
  ll k;                                                                        \\
  cin >> k;
#define ip3(n, m, k)                                                           \\
  ll n;                                                                        \\
  cin >> n;                                                                    \\
  ll m;                                                                        \\
  cin >> m;                                                                    \\
  ll k;                                                                        \\
  cin >> k;
#define kl '\\n'
#define no cout << "NO" << '\\n'
#define yes cout << "YES" << '\\n'
#define case cout << "Case " << t++ << ": ";
// #define ps(x,y)         fixed<<setprecision(y)<<x
#define inf 1e18
#define dbg(x) cout << '>' << #x << ':' << x << kl;
#define trc(x) cerr << #x << ": " << x << kl
#define trc2(x, y) cerr << #x << ": " << x << " | " << #y << ": " << y << kl
#define trc3(x, y, z)                                                          \\
  cerr << #x << ":" << x << " | " << #y << ": " << y << " | " << #z << ": "    \\
       << z << kl
#define trc4(a, b, c, d)                                                       \\
  cerr << #a << ": " << a << " | " << #b << ": " << b << " | " << #c << ": "   \\
       << c << " | " << #d << ": " << d << kl
#define trc5(a, b, c, d, e)                                                    \\
  cerr << #a << ": " << a << " | " << #b << ": " << b << " | " << #c << ": "   \\
       << c << " | " << #d << ": " << d << " | " << #e << ": " << e << kl
#define trc6(a, b, c, d, e, f)                                                 \\
  cerr << #a << ": " << a << " | " << #b << ": " << b << " | " << #c << ": "   \\
       << c << " | " << #d << ": " << d << " | " << #e << ": " << e << " | "   \\
       << #f << ": " << f << kl
#define w(x)                                                                   \\
  ll x;                                                                        \\
  cin >> x;                                                                    \\
  while (x--)
#define go(i, a) for (auto &i : a)
#define go1(it, v) for (auto it = v.begin(); it != v.end(); ++it)
#define mk(arr, n, type) type *arr = new type[n];
#define sz(obj) (int(obj.size()))
#define ipve(vc, n)                                                            \\
  vll vc(n);                                                                   \\
  ff1(i, 0, n) { cin >> vc[i]; }
#define ipvc(vc, n)                                                            \\
  vll vc;                                                                      \\
  ff1(i, 0, n) {                                                               \\
    ip(x);                                                                     \\
    vc.pb(x);                                                                  \\
  }
#define depressed()                                                            \\
  ios_base::sync_with_stdio(false);                                            \\
  cin.tie(NULL);                                                               \\
  cout.tie(NULL)
// bool ans = all_of(arr, arr + 6, [](int x) {return x & 1; } );
const double pi = 3.141592653589793238460;
bool isptsquare(long double x) {
  long double sr = sqrt(x);
  return ((sr - floor(sr)) == 0);
}

ll facts(ll n, ll mod) {
  ll prod = 1;
  for (ll i = 1; i <= n; i++) {
    prod = (prod * i) % mod;
  }
  return prod;
}

ll binpow(ll a, ll b, ll mod) {
  ll ans = 1;
  while (b) {
    if (b & 1)
      ans *= a;
    a *= a;
    ans %= mod;
    a %= mod;
    b /= 2;
  }
  return ans;
}
ll mod = 1e9 + 7;
vector<ll> factors(ll n) { // returns all factors of a given number
  ll lim = sqrt(n);
  vector<ll> f;
  for (int i = 1; i <= lim; i++) {
    if (n % i == 0) {
      f.push_back(i);
      f.push_back(n / i);
      if (i * i == n) {
        f.pop_back();
      }
    }
  }
  return f;
}

ll ceilAB(ll a, ll b) { return (a + b - 1) / b; }
ll bigmod(ll n, ll pow) {
  if (pow == 0)
    return 1;
  if (pow == 1)
    return n % mod;

  ll ans = bigmod(n, pow / 2);
  ans = (ans * ans) % mod;

  if (pow % 2 == 1) {
    ans = (ans * n) % mod;
  }
  return ans % mod;
}

const int mxn = 1e3;

ll fact[mxn + 1];
void calcfac(ll n, ll mod = 2e18) {
  fact[0] = 1;
  for (int i = 1; i <= n; ++i) {
    fact[i] = fact[i - 1] * i;
    fact[i] %= mod;
  }
}

ll nCr(ll p, ll q, ll mod = 2e18) {
  ll val = fact[p];
  ll invfact = fact[q] * fact[p - q];
  val %= mod;
  invfact %= mod;
  val *= binpow(invfact, mod - 2, mod);
  return val % mod;
}

ll nPr(ll p, ll q, ll mod = 2e18) {
  ll val = nCr(p, q, mod);
  val *= fact[q];
  val %= mod;
  return val;
}

bool isprime(ll n) {
  // Corner cases
  if (n <= 1)
    return false;
  if (n <= 3)
    return true;
  if (n % 2 == 0 || n % 3 == 0)
    return false;

  for (int i = 5; i * i <= n; i = i + 6)
    if (n % i == 0 || n % (i + 2) == 0)
      return false;

  return true;
}
ll power(ll x, ll y) {
  ll temp;
  if (y == 0)
    return 1;
  temp = power(x, y / 2);
  if (y % 2 == 0)
    return temp * temp;
  else {
    if (y > 0)
      return (x * temp * temp);
    else
      return ((temp * temp) / x);
  }
}

// ll pmod(ll a,ll b){ll res=1;a%=mod;assert(b>=0);for(; b;
// b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;} ll expo(ll x, ll y){ ll
// res = 1; x = x % mod;  while (y > 0) { if (y & 1)res = (res*x) % mod; y =
// y>>1;x = (x*x) % mod;}return res;} void matmul(ll a[][2], ll b[][2]) { ll
// tmp[2][2]; for(int i=0; i<2; i++) { for(int j=0; j<2; j++) { tmp[i][j] = 0;
// for(int k=0; k<2; k++) tmp[i][j] = (tmp[i][j] + a[i][k]*b[k][j]) % mod; }}
// for(int i=0; i<2; i++) for(int j=0; j<2; j++) a[i][j] = tmp[i][j]; } ll
// fibo(int n)    // returns nth fibonacci number, also S(n) = f(n+2)-1 { if(n
//== 0) return 0; else if(n == 1) return 1; ll T[2][2] = { {0, 1} , {1, 1} }; ll
//res[2][2] = { {1, 0}, {0,1} }; n--; while(n) { if(n & 1) matmul(res, T); n >>=
//1; matmul(T, T); } return res[1][1]; }

ll cbtr(ll n, ll m) {
  ll sm = 1;
  ff1(i, 1, m + 1) {
    sm *= (n - i + 1);
    sm /= i;
  }
  return sm;
}
// string a="cdefghijklmnopqrstuvwxyz";
ld f(ld n) {
  ld sm = 1;
  ff1(i, 1, n + 1) { sm *= i; }
  return sm;
}
ld pc(ld n, ld k) {
  ld sm = f(n) / f(n - k);
  return sm;
}
vll prime;
void seive(ll n) {
  prime.resize(n + 1, 1);
  iota(prime.begin(), prime.end(), 0);
  prime[0] = 0, prime[1] = 1;
  for (int i = 2; i * i <= n; i++)
    if (prime[i] == i)
      for (int j = i * i; j <= n; j += i)
        prime[j] = i;
}
map<ll, ll> prime_factor(ll n) {
  map<ll, ll> ret;
  for (ll i = 2; i * i <= n; i++) {
    while (n % i == 0) {
      ret[i]++;
      n /= i;
    }
  }
  if (n != 1)
    ret[n] = 1;
  return ret;
}
bool p2(ll n) {
  if (n == 0)
    return false;

  return (ceil(log2(n)) == floor(log2(n)));
}
#define cer                                                                    \\
  cerr << "Time : " << 1000 * ((double)clock()) / (double)CLOCKS_PER_SEC       \\
       << "ms\\n";
#define ps(x, y) fixed << setprecision(y) << x
ll modInverse(ll n, ll m) { return binpow(n, m - 2, m); }
bool cmp(pll a, pll b) {
  if (a.ss == b.ss) {
    return a.ff > b.ff;
  }
  return a.ff > b.ff;
}

void fun() {
  ip(n);
  ipvc(a, n);
  vll b, c;
  ff1(i, 0, n - 1) {
    if (a[i + 1] > a[i]) {
      c.pb(a[i]);
      c.pb(a[i + 1]);
    }
  }
  ll sm = 1000;
  // go(i,c) cout<<i<<kl;
  ff1(i, 0, sz(c)) {
    ll k = sm / a[i];
    sm -= k * c[i];
    sm += k * c[i + 1];
    i++;
  }
  cout << sm;
}

int main() {
  depressed();
  ll t = 1;
  // cin>>t;
  while (t--) {
    fun();
  }
  // cer;
  return 0;
}