Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int>pii;
const int MAXN=3e5+5;
const int BASE=3137;
const int MOD1=1e9+7;
const int MOD2=1e9+9;
int N;
char s[MAXN];
pii pref[MAXN],pot[MAXN];
map<pii,int>cnt;

inline int add(int x,int y,int mod){
	x+=y;
	if(x>=mod)
		x-=mod;
	else if(x<0)
		x+=mod;
	return x;
}

inline int mul(int x,int y,int mod){
	return (ll)x*y%mod;
}

int power(int x,int y,int mod){
	int res=1;
	for(;y;y/=2){
		if(y%2)res=mul(res,x,mod);
		x=mul(x,x,mod);
	}
	return res;
}

pii operator +(const pii&l,const pii&r){
	int a=l.first,b=l.second;
	int c=r.first,d=r.second;
	return{add(a,c,MOD1),add(b,f,MOD2)};
}

pii operator*(const pii &l,const pii &r){
	int a=l.first,b=l.second;
	int c=r.first,d=r.second;
	return{mul(a,c,MOD1),mul(b,d,MOD2)};
}

ll solve(){
	int inv1=power(BASE,MOD1-2,MOD1);
	int inv2=power(BASE,MOD2-2,MOD2);
	pot[0]={1,1};
	for(int i=1;i<=N;++i){
		pot[i]=pot[i-1];
		pref[i]=pref[i-1];
		if(s[i]=='>')
			pot[i]=pot[i]*pii(BASE,BASE);
		else if(s[i]=='<')
			pot[i]=pot[i]*pii(inv1,inv2);
		else if(s[i]=='+')
			pref[i]=pref[i]+pot[i];
		else{
			int a=pot[i].first;
			pref[i]+=pii(-a,-pot[i].second);
		}
	}
	ll ans=0;
	for(int i=N;i;--i){
		++cnt[pref[i]];
		int a=pref[N];
		ans+=cnt[(a*pot[i-1])+pref[i-1]];
	}
	return ans;
}

int main(){
	scanf("%d%s",&N,s+1);
	printf("%lld\n",solve());
	return 0;
}

Compiler output:
a.cc: In function 'pii operator+(const pii&, const pii&)':
a.cc:39:36: error: 'f' was not declared in this scope
   39 |         return{add(a,c,MOD1),add(b,f,MOD2)};
      |                                    ^
a.cc:39:43: error: could not convert '{add(a, c, ((int)MOD1)), <expression error>}' from '<brace-enclosed initializer list>' to 'pii' {aka 'std::pair<int, int>'}
   39 |         return{add(a,c,MOD1),add(b,f,MOD2)};
      |                                           ^
      |                                           |
      |                                           <brace-enclosed initializer list>
a.cc: In function 'll solve()':
a.cc:63:32: error: no match for 'operator+=' (operand types are 'pii' {aka 'std::pair<int, int>'} and 'pii' {aka 'std::pair<int, int>'})
   63 |                         pref[i]+=pii(-a,-pot[i].second);
      |                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
a.cc:69:29: error: cannot convert 'pii' {aka 'std::pair<int, int>'} to 'int' in initialization
   69 |                 int a=pref[N];
      |                       ~~~~~~^
      |                             |
      |                             pii {aka std::pair<int, int>}
a.cc:70:28: error: no match for 'operator*' (operand types are 'int' and 'pii' {aka 'std::pair<int, int>'})
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                           ~^~~~~~~~~
      |                           |        |
      |                           int      pii {aka std::pair<int, int>}
In file included from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:1:
/usr/include/c++/14/complex:400:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator*(const complex<_Tp>&, const complex<_Tp>&)'
  400 |     operator*(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:400:5: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   mismatched types 'const std::complex<_Tp>' and 'int'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
/usr/include/c++/14/complex:409:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator*(const complex<_Tp>&, const _Tp&)'
  409 |     operator*(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:409:5: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   mismatched types 'const std::complex<_Tp>' and 'int'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
/usr/include/c++/14/complex:418:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator*(const _Tp&, const complex<_Tp>&)'
  418 |     operator*(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:418:5: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   'pii' {aka 'std::pair<int, int>'} is not derived from 'const std::complex<_Tp>'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166:
/usr/include/c++/14/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, struct std::__multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
/usr/include/c++/14/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, struct std::__multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
/usr/include/c++/14/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, struct std::__multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   'pii' {aka 'std::pair<int, int>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
/usr/include/c++/14/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, struct std::__multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
/usr/include/c++/14/bits/valarray_after.h:407:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, struct std::__multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   'pii' {aka 'std::pair<int, int>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
/usr/include/c++/14/valarray:1198:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const valarray<_Tp>&, const valarray<_Tp>&)'
 1198 | _DEFINE_BINARY_OPERATOR(*, __multiplies)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1198:1: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   mismatched types 'const std::valarray<_Tp>' and 'int'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
/usr/include/c++/14/valarray:1198:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)'
 1198 | _DEFINE_BINARY_OPERATOR(*, __multiplies)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1198:1: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   mismatched types 'const std::valarray<_Tp>' and 'int'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
/usr/include/c++/14/valarray:1198:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__multiplies, _Tp>::result_type> std::operator*(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)'
 1198 | _DEFINE_BINARY_OPERATOR(*, __multiplies)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1198:1: note:   template argument deduction/substitution failed:
a.cc:70:36: note:   'pii' {aka 'std::pair<int, int>'} is not derived from 'const std::valarray<_Tp>'
   70 |                 ans+=cnt[(a*pot[i-1])+pref[i-1]];
      |                                    ^
a.cc:42:5: note: candidate: 'pii operator*(const pii&, const pii&)'
   42 | pii operator*(const pii &l,const pii &r){
      |     ^~~~~~~~
a.cc:42:26: note:   no known conversion for argument 1 from 'int' to 'const pii&' {aka 'const std::pair<int, int>&'}
   42 | pii operator*(const pii &l,const pii &r){
      |               ~~~~~~~~~~~^