Submission #494220

#	Time	Username	Problem	Language	Result	Execution time	Memory
494220		nickmet2004	Bigger segments (IZhO19_segments)	C++11	Compilation error	0 ms	0 KiB

segments

#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N = 5e5 + 5;
int n , a[N];
 main (){
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n;
    for(int i = 1; i<= n;++i)cin >> a[i];
    int x = a[1] , i = 2;
    set<int> s; int ans = 1;
    while(i <= n){
        int y =0;
        while(x > y + a[i])y+=a[i] , ++i ,s.insert(y);
        y+=a[i];
        //cout << y << " y" << endl;
        ans++;
        int z = (y - x)/2;
        int q = *s.lower_bound(z);
        s.clear();
        if(s.lower_bound() != s.end())y -= z;
        x = y;
        ++i;
    }cout << ans;
}

Compilation message (stderr)

segments.cpp:6:2: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    6 |  main (){
      |  ^~~~
segments.cpp: In function 'int main()':
segments.cpp:21:26: error: no matching function for call to 'std::set<long long int>::lower_bound()'
   21 |         if(s.lower_bound() != s.end())y -= z;
      |                          ^
In file included from /usr/include/c++/10/set:61,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:87,
                 from segments.cpp:1:
/usr/include/c++/10/bits/stl_set.h:829:7: note: candidate: 'std::set<_Key, _Compare, _Alloc>::iterator std::set<_Key, _Compare, _Alloc>::lower_bound(const key_type&) [with _Key = long long int; _Compare = std::less<long long int>; _Alloc = std::allocator<long long int>; std::set<_Key, _Compare, _Alloc>::iterator = std::_Rb_tree<long long int, long long int, std::_Identity<long long int>, std::less<long long int>, std::allocator<long long int> >::const_iterator; std::set<_Key, _Compare, _Alloc>::key_type = long long int]'
  829 |       lower_bound(const key_type& __x)
      |       ^~~~~~~~~~~
/usr/include/c++/10/bits/stl_set.h:829:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/10/bits/stl_set.h:833:7: note: candidate: 'std::set<_Key, _Compare, _Alloc>::const_iterator std::set<_Key, _Compare, _Alloc>::lower_bound(const key_type&) const [with _Key = long long int; _Compare = std::less<long long int>; _Alloc = std::allocator<long long int>; std::set<_Key, _Compare, _Alloc>::const_iterator = std::_Rb_tree<long long int, long long int, std::_Identity<long long int>, std::less<long long int>, std::allocator<long long int> >::const_iterator; std::set<_Key, _Compare, _Alloc>::key_type = long long int]'
  833 |       lower_bound(const key_type& __x) const
      |       ^~~~~~~~~~~
/usr/include/c++/10/bits/stl_set.h:833:7: note:   candidate expects 1 argument, 0 provided
segments.cpp:19:13: warning: unused variable 'q' [-Wunused-variable]
   19 |         int q = *s.lower_bound(z);
      |             ^