Language: C++

	
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;

const int MAXN=500005;

ll ans,a[MAXN],s[MAXN],c[MAXN],ss[MAXN],n,k;

map to;

ll lowbit(ll x){
return x & -x;
}

void change(ll x,ll y){
while (x<=n){
// printf("%d ",x);
c[x]+=y;
x+=lowbit(x);
}
return;
}

ll sum(ll x){
ll s=0;
while (x>=1){
s+=c[x];
x-=lowbit(x);
}
return s;
}

int main(){
int i;
scanf("%lld%lld",&n,&k);
for (i=1;i<=n;i++){ scanf("%lld",&a[i]); a[i]-=k; s[i]=s[i-1]+a[i]; ss[i]=ss[i-1]+a[i]; if (s[i]>=0) ans++;
}
change(s[1],1ll);
for (i=2;i<=n;i++){
ans+=sum(s[i]);
change(s[i],1ll); 
// printf("%lld ",ans);
} 
// printf("\n");
printf("%lld",ans);
return 0;
}

Compiler output:
a.cc:11:5: error: class template argument deduction failed:
   11 | map to;
      |     ^~
a.cc:11:5: error: no matching function for call to 'map()'
In file included from /usr/include/c++/14/map:63,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:152,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_map.h:302:9: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc, class _InputIterator> map(_InputIterator, _InputIterator, const _Compare&, const _Alloc&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  302 |         map(_InputIterator __first, _InputIterator __last,
      |         ^~~
/usr/include/c++/14/bits/stl_map.h:302:9: note:   candidate expects 3 arguments, 0 provided
/usr/include/c++/14/bits/stl_map.h:285:9: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc, class _InputIterator> map(_InputIterator, _InputIterator)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  285 |         map(_InputIterator __first, _InputIterator __last)
      |         ^~~
/usr/include/c++/14/bits/stl_map.h:285:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_map.h:268:9: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc, class _InputIterator> map(_InputIterator, _InputIterator, const _Alloc&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  268 |         map(_InputIterator __first, _InputIterator __last,
      |         ^~~
/usr/include/c++/14/bits/stl_map.h:268:9: note:   candidate expects 3 arguments, 0 provided
/usr/include/c++/14/bits/stl_map.h:262:7: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map(std::initializer_list<std::pair<const _Key, _Val> >, const _Alloc&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  262 |       map(initializer_list<value_type> __l, const allocator_type& __a)
      |       ^~~
/usr/include/c++/14/bits/stl_map.h:262:7: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_map.h:256:7: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map(std::map<_Key, _Tp, _Compare, _Allocator>&&, std::__type_identity_t<_Alloc>&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  256 |       map(map&& __m, const __type_identity_t<allocator_type>& __a)
      |       ^~~
/usr/include/c++/14/bits/stl_map.h:256:7: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_map.h:252:7: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map(const std::map<_Key, _Tp, _Compare, _Allocator>&, std::__type_identity_t<_Alloc>&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  252 |       map(const map& __m, const __type_identity_t<allocator_type>& __a)
      |       ^~~
/usr/include/c++/14/bits/stl_map.h:252:7: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_map.h:248:7: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map(const _Alloc&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  248 |       map(const allocator_type& __a)
      |       ^~~
/usr/include/c++/14/bits/stl_map.h:248:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_map.h:240:7: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map(std::initializer_list<std::pair<const _Key, _Val> >, const _Compare&, const _Alloc&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  240 |       map(initializer_list<value_type> __l,
      |       ^~~
/usr/include/c++/14/bits/stl_map.h:240:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_map.h:227:7: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map(std::map<_Key, _Tp, _Compare, _Allocator>&&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  227 |       map(map&&) = default;
      |       ^~~
/usr/include/c++/14/bits/stl_map.h:227:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_map.h:219:7: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map(const std::map<_Key, _Tp, _Compare, _Allocator>&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  219 |       map(const map&) = default;
      |       ^~~
/usr/include/c++/14/bits/stl_map.h:219:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_map.h:206:7: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map(const _Compare&, const _Alloc&)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  206 |       map(const _Compare& __comp,
      |       ^~~
/usr/include/c++/14/bits/stl_map.h:206:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_map.h:197:7: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map()-> std::map<_Key, _Tp, _Compare, _Alloc>'
  197 |       map() = default;
      |       ^~~
/usr/include/c++/14/bits/stl_map.h:197:7: note:   template argument deduction/substitution failed:
a.cc:11:5: note:   couldn't deduce template parameter '_Key'
   11 | map to;
      |     ^~
/usr/include/c++/14/bits/stl_map.h:102:11: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Alloc> map(std::map<_Key, _Tp, _Compare, _Alloc>)-> std::map<_Key, _Tp, _Compare, _Alloc>'
  102 |     class map
      |           ^~~
/usr/include/c++/14/bits/stl_map.h:102:11: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_map.h:1495:5: note: candidate: 'template<class _Key, class _Tp, class _Allocator, class> std::map(initializer_list<pair<_T1, _T2> >, _Allocator)-> map<_Key, _Tp, less<_Key>, _Allocator>'
 1495 |     map(initializer_list<pair<_Key, _Tp>>, _Allocator)
      |     ^~~
/usr/include/c++/14/bits/stl_map.h:1495:5: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_map.h:1489:5: note: candidate: 'template<class _InputIterator, class _Allocator, class, class> std::map(_InputIterator, _InputIterator, _Allocator)-> map<typename remove_const<typename iterator_traits< <template-parameter-1-1> >::value_type::first_type>::type, typename iterator_traits< <template-parameter-1-1> >::value_type::second_type, less<typename remove_const<typename iterator_traits< <template-parameter-1-1> >::value_type::first_type>::type>, _Allocator>'
 1489 |     map(_InputIterator, _InputIterator, _Allocator)
      |     ^~~
/usr/include/c++/14/bits/stl_map.h:1489:5: note:   candidate expects 3 arguments, 0 provided
/usr/include/c++/14/bits/stl_map.h:1482:5: note: candidate: 'template<class _Key, class _Tp, class _Compare, class _Allocator, class, class> std::map(initializer_list<pair<_T1, _T2> >, _Compare, _Allocator)-> map<_Key, _Tp, _Compare, _Allocator>'
 1482 |     map(initializer_list<pair<_Key, _Tp>>,
      |     ^~~
/usr/include/c++/14/bits/stl_map.h:1482:5: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_map.h:1473:5: note: candidate: 'template<class _InputIterator, class _Compare, class _Allocator, class, class, class> std::map(_InputIterator, _InputIterator, _Compare, _Allocator)-> map<typename remove_const<typename iterator_traits< <template-parameter-1-1> >::value_type::first_type>::type, typename iterator_traits< <template-parameter-1-1> >::value_type::second_type, _Compare, _Allocator>'
 1473 |     map(_InputIterator, _InputIterator,
      |     ^~~
/usr/include/c++/14/bits/stl_map.h:1473:5: note:   candidate expects 2 arguments, 0 provided