Language: C++

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

signed main(){
  string s;cin>>s;
  int N=s.size()+1;
  vector<int> v(N,-1);
  set<int> se;
  for(int i=0;i<N;i++){
    if(!i){if(s[i]=='<')v[i]=0,se.insert(i);}
    else if(i==N-1){if(s[N-2]=='>')v[i]=0,se.insert(i);}
    else if(s[i-1]=='>'&&s[i]=='<')v[i]=0,se.insert(i);
  }
  //for(int i=0;i<N;i++)cout<<v[i]<<" ";cout<<endl;
  for(int p:se){
    int now=p;now--;
    while(now>=0&&now<N&&!se.count(now)){
      if(s[now]=='<')v[now]=max(0,v[now]);
      else v[now]=max(v[now],v[now+1]+1);
      now--;
    }
    now=p+1;
    while(now>=0&&now<N&&!se.count(now)){
      if(s[now-1]=='>')v[now]=max(0,v[now]);
      else v[now]=max(v[now],v[now-1]+1);
      now++;
    }
  }
  int ans=0;
  for(int i=0;i<N;i++)ans+=v[i];//,cout<<v[i]<<" ";cout<<endl;
  cout<<ans<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:32: error: no matching function for call to 'max(int, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&)'
   19 |       if(s[now]=='<')v[now]=max(0,v[now]);
      |                             ~~~^~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:19:32: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'})
   19 |       if(s[now]=='<')v[now]=max(0,v[now]);
      |                             ~~~^~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:19:32: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   19 |       if(s[now]=='<')v[now]=max(0,v[now]);
      |                             ~~~^~~~~~~~~~
a.cc:25:34: error: no matching function for call to 'max(int, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&)'
   25 |       if(s[now-1]=='>')v[now]=max(0,v[now]);
      |                               ~~~^~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:25:34: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'})
   25 |       if(s[now-1]=='>')v[now]=max(0,v[now]);
      |                               ~~~^~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:25:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   25 |       if(s[now-1]=='>')v[now]=max(0,v[now]);
      |                               ~~~^~~~~~~~~~