Language: C++

//2020-06-02
#include <bits/stdc++.h>
using namespace std;
#define loop(v, st, en) for (int v = st; v < en; v++)
#define loopdesc(v, st, en) for (int v = st; v >= en; v--)
#define INF 1E9
#define clr(v, d) memset(v, d, sizeof(v))
#define pb push_back
#define MP make_pair
#define P(x) cout << #x << " = { " << x << " }\n"
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<int> vi;
const int M = 2e5 + 5;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    //freopen("input.txt", "r", stdin);
    int n;ll x[M];
    ll sum = 1;
    cin >> n;
    bool iszero=0, isflow=0;
    loop(i, 0, n)
    {
        cin >> x;
        if(!isflow)sum *= x;
        if(x==0)iszero=1;
        if(sum >= (ll)10e18)isflow=1;
    }
    if(iszero)cout <<"0\n";
    else if (isflow)
        cout << "-1\n";
    else cout<<sum<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:29:13: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'll [200005]' {aka 'long long int [200005]'})
   29 |         cin >> x;
      |         ~~~ ^~ ~
      |         |      |
      |         |      ll [200005] {aka long long int [200005]}
      |         std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:2:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'll*' {aka 'long long int*'}
   29 |         cin >> x;
      |                ^
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: invalid conversion from 'll*' {aka 'long long int*'} to 'short int' [-fpermissive]
   29 |         cin >> x;
      |                ^
      |                |
      |                ll* {aka long long int*}
a.cc:29:16: error: cannot bind rvalue '(short int)((ll*)(& x))' to 'short int&'
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: invalid conversion from 'll*' {aka 'long long int*'} to 'short unsigned int' [-fpermissive]
   29 |         cin >> x;
      |                ^
      |                |
      |                ll* {aka long long int*}
a.cc:29:16: error: cannot bind rvalue '(short unsigned int)((ll*)(& x))' to 'short unsigned int&'
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: invalid conversion from 'll*' {aka 'long long int*'} to 'int' [-fpermissive]
   29 |         cin >> x;
      |                ^
      |                |
      |                ll* {aka long long int*}
a.cc:29:16: error: cannot bind rvalue '(int)((ll*)(& x))' to 'int&'
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: invalid conversion from 'll*' {aka 'long long int*'} to 'unsigned int' [-fpermissive]
   29 |         cin >> x;
      |                ^
      |                |
      |                ll* {aka long long int*}
a.cc:29:16: error: cannot bind rvalue '(unsigned int)((ll*)(& x))' to 'unsigned int&'
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: invalid conversion from 'll*' {aka 'long long int*'} to 'long int' [-fpermissive]
   29 |         cin >> x;
      |                ^
      |                |
      |                ll* {aka long long int*}
a.cc:29:16: error: cannot bind rvalue '(long int)((ll*)(& x))' to 'long int&'
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: invalid conversion from 'll*' {aka 'long long int*'} to 'long unsigned int' [-fpermissive]
   29 |         cin >> x;
      |                ^
      |                |
      |                ll* {aka long long int*}
a.cc:29:16: error: cannot bind rvalue '(long unsigned int)((ll*)(& x))' to 'long unsigned int&'
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: invalid conversion from 'll*' {aka 'long long int*'} to 'long long int' [-fpermissive]
   29 |         cin >> x;
      |                ^
      |                |
      |                ll* {aka long long int*}
a.cc:29:16: error: cannot bind rvalue '(long long int)((ll*)(& x))' to 'long long int&'
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: invalid conversion from 'll*' {aka 'long long int*'} to 'long long unsigned int' [-fpermissive]
   29 |         cin >> x;
      |                ^
      |                |
      |                ll* {aka long long int*}
a.cc:29:16: error: cannot bind rvalue '(long long unsigned int)((ll*)(& x))' to 'long long unsigned int&'
/usr/include/c++/14/istream:328:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  328 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/14/istream:328:7: note:   conversion of argument 1 would be ill-formed:
a.cc:29:16: error: cannot bind non-const lvalue reference of type 'void*&' to an rvalue of type 'void*'
   29 |         cin >> x;
      |                ^
/usr/include/c++/14/istream:219:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  219 |       operator>>(float& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:219:25: note:   no known conversion for argument 1 from 'll [200005]' {aka 'long long int [200005]'} to 'float&'
  219 |       operator>>(float& __f)
      |                  ~~~~~~~^~~
/usr/include/c++/14/istream:223:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  223 |       operator>>(double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:223:26: note:   no known conversion for argument 1 from 'll [200005]' {aka 'long long int [200005]'} to 'double&'
  223 |       operator>>(double& __f)
      |                  ~~~~~~~~^~~
/usr/include/c++/14/istream:227:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  227 |       operator>>(long double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:227:31: note:   no known conversion for argument 1 from 'll [200005]' {aka 'long long int [200005]'} to 'long double&'
  227 |       operator>>(long double& __f)
      |                  ~~~~~~~~~~~~~^~~
/usr/include/c++/14/istream:122:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__istream_type& (*)(__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:36: note:   no known conversion for argument 1 from 'll [200005]' {aka 'long long int [200005]'} to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'}
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |                  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/istream:126:7: note: candidate: 'std