Language: C++

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

int main() {
int n;
cin >> n;
long long a[n];
long long ans = 0;
for(int i=0;i<n;i++){
    cin >> a[i];
}
long long sum[n+1];
pair<long long,long long> p;
p[0ll]=1;
for(long long i=0;i<n;i++){
    sum[i+1]=sum[i]+a[i];
}
for(long long i=0;i<n;i++){
    if(p.find(sum[i+1])==p.end();) p[sum[i+1]]=1;
    else p[sum[i+1]]++;
}
for(auto i:p){
    ans+=i*(i-1)/2;
}
cout << ans;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:2: error: no match for 'operator[]' (operand types are 'std::pair<long long int, long long int>' and 'long long int')
   14 | p[0ll]=1;
      |  ^
a.cc:19:10: error: 'struct std::pair<long long int, long long int>' has no member named 'find'
   19 |     if(p.find(sum[i+1])==p.end();) p[sum[i+1]]=1;
      |          ^~~~
a.cc:19:28: error: 'struct std::pair<long long int, long long int>' has no member named 'end'
   19 |     if(p.find(sum[i+1])==p.end();) p[sum[i+1]]=1;
      |                            ^~~
a.cc:19:34: error: expected primary-expression before ')' token
   19 |     if(p.find(sum[i+1])==p.end();) p[sum[i+1]]=1;
      |                                  ^
a.cc:19:37: error: no match for 'operator[]' (operand types are 'std::pair<long long int, long long int>' and 'long long int')
   19 |     if(p.find(sum[i+1])==p.end();) p[sum[i+1]]=1;
      |                                     ^
a.cc:20:11: error: no match for 'operator[]' (operand types are 'std::pair<long long int, long long int>' and 'long long int')
   20 |     else p[sum[i+1]]++;
      |           ^
a.cc:22:12: error: no matching function for call to 'begin(std::pair<long long int, long long int>&)'
   22 | for(auto i:p){
      |            ^
In file included from /usr/include/c++/14/bits/algorithmfwd.h:39,
                 from /usr/include/c++/14/bits/stl_algo.h:59,
                 from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/initializer_list:88:5: note: candidate: 'template<class _Tp> constexpr const _Tp* std::begin(initializer_list<_Tp>)'
   88 |     begin(initializer_list<_Tp> __ils) noexcept
      |     ^~~~~
/usr/include/c++/14/initializer_list:88:5: note:   template argument deduction/substitution failed:
a.cc:22:12: note:   'std::pair<long long int, long long int>' is not derived from 'std::initializer_list<_Tp>'
   22 | for(auto i:p){
      |            ^
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/range_access.h:52:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.begin()) std::begin(_Container&)'
   52 |     begin(_Container& __cont) -> decltype(__cont.begin())
      |     ^~~~~
/usr/include/c++/14/bits/range_access.h:52:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/range_access.h: In substitution of 'template<class _Container> constexpr decltype (__cont.begin()) std::begin(_Container&) [with _Container = std::pair<long long int, long long int>]':
a.cc:22:12:   required from here
   22 | for(auto i:p){
      |            ^
/usr/include/c++/14/bits/range_access.h:52:50: error: 'struct std::pair<long long int, long long int>' has no member named 'begin'
   52 |     begin(_Container& __cont) -> decltype(__cont.begin())
      |                                           ~~~~~~~^~~~~
/usr/include/c++/14/bits/range_access.h:63:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.begin()) std::begin(const _Container&)'
   63 |     begin(const _Container& __cont) -> decltype(__cont.begin())
      |     ^~~~~
/usr/include/c++/14/bits/range_access.h:63:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/range_access.h: In substitution of 'template<class _Container> constexpr decltype (__cont.begin()) std::begin(const _Container&) [with _Container = std::pair<long long int, long long int>]':
a.cc:22:12:   required from here
   22 | for(auto i:p){
      |            ^
/usr/include/c++/14/bits/range_access.h:63:56: error: 'const struct std::pair<long long int, long long int>' has no member named 'begin'
   63 |     begin(const _Container& __cont) -> decltype(__cont.begin())
      |                                                 ~~~~~~~^~~~~
/usr/include/c++/14/bits/range_access.h:95:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::begin(_Tp (&)[_Nm])'
   95 |     begin(_Tp (&__arr)[_Nm]) noexcept
      |     ^~~~~
/usr/include/c++/14/bits/range_access.h:95:5: note:   template argument deduction/substitution failed:
a.cc:22:12: note:   mismatched types '_Tp [_Nm]' and 'std::pair<long long int, long long int>'
   22 | for(auto i:p){
      |            ^
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166:
/usr/include/c++/14/valarray:1227:5: note: candidate: 'template<class _Tp> _Tp* std::begin(valarray<_Tp>&)'
 1227 |     begin(valarray<_Tp>& __va) noexcept
      |     ^~~~~
/usr/include/c++/14/valarray:1227:5: note:   template argument deduction/substitution failed:
a.cc:22:12: note:   'std::pair<long long int, long long int>' is not derived from 'std::valarray<_Tp>'
   22 | for(auto i:p){
      |            ^
/usr/include/c++/14/valarray:1238:5: note: candidate: 'template<class _Tp> const _Tp* std::begin(const valarray<_Tp>&)'
 1238 |     begin(const valarray<_Tp>& __va) noexcept
      |     ^~~~~
/usr/include/c++/14/valarray:1238:5: note:   template argument deduction/substitution failed:
a.cc:22:12: note:   'std::pair<long long int, long long int>' is not derived from 'const std::valarray<_Tp>'
   22 | for(auto i:p){
      |            ^
a.cc:22:12: error: no matching function for call to 'end(std::pair<long long int, long long int>&)'
/usr/include/c++/14/initializer_list:99:5: note: candidate: 'template<class _Tp> constexpr const _Tp* std::end(initializer_list<_Tp>)'
   99 |     end(initializer_list<_Tp> __ils) noexcept
      |     ^~~
/usr/include/c++/14/initializer_list:99:5: note:   template argument deduction/substitution failed:
a.cc:22:12: note:   'std::pair<long long int, long long int>' is not derived from 'std::initializer_list<_Tp>'
   22 | for(auto i:p){
      |            ^
/usr/include/c++/14/bits/range_access.h:74:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.end()) std::end(_Container&)'
   74 |     end(_Container& __cont) -> decltype(__cont.end())
      |     ^~~
/usr/include/c++/14/bits/range_access.h:74:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/range_access.h: In substitution of 'template<class _Container> constexpr decltype (__cont.end()) std::end(_Container&) [with _Container = std::pair<long long int, long long int>]':
a.cc:22:12:   required from here
   22 | for(auto i:p){
      |            ^
/usr/include/c++/14/bits/range_access.h:74:48: error: 'struct std::pair<long long int, long long int>' has no member named 'end'
   74 |     end(_Container& __cont) -> decltype(__cont.end())
      |                                         ~~~~~~~^~~
/usr/include/c++/14/bits/range_access.h:85:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.end()) std::end(const _Container&)'
   85 |     end(const _Container& __cont) -> decltype(__cont.end())
      |     ^~~
/usr/include/c++/14/bits/range_access.h:85:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/bits/range_access.h: In substitution of 'template<class _Container> constexpr decltype (__cont.end()) std::end(const _Container&) [with _Container = std::pair<long long int, long long int>]':
a.cc:22:12:   required from here
   22 | for(auto i:p){
      |            ^
/usr/include/c++/14/bits/range_access.h:85:54: error: 'const struct std::pair<long long int, long long int>' has no member named 'end'
   85 |     end(const _Container& __cont) -> decltype(__cont.end())
      |                                               ~~~~~~~^~~
/usr/include/c++/14/bits/range_access.h:106:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::end(_Tp (&)[_Nm])'
  106 |     end(_Tp (&__arr)[_Nm]) noexcept
      |     ^~~
/usr/include/c++/14/bits/range_access.h:106:5: note:   template argument deduction/substitution failed:
a.cc:22:12: note:   mismatched types '_Tp [_Nm]' and 'std::pair<long long int, long long int>'
   22 | for(auto i:p){
      |            ^
/usr/include/c++/14/valarray:1249:5: note: candidate: 'template<class _Tp> _Tp* std::end(valarray<_Tp>&)'
 1249 |     end(valarray<_Tp>& __va) noexcept
      |     ^~~
/usr/include/c++/14/valarray:1249:5: note:   template argument deduction/substitution failed:
a.cc:22:12: note:   'std::pair<long long int, long long int>' is not derived from 'std::valarray<_Tp>'
   22 | for(auto i:p){
      |            ^
/usr/include/c++/14/valarray:1265:5: note: candidate: 'template<class _Tp> const _Tp* std::end(const valarray<_Tp>&)'
 1265 |     end(const valarray<_Tp>& __va) noexcept
      |     ^~~
/usr/include/c++/14/valarray:1265:5: note:   template argument deduction/substitution failed:
a.cc:22:12: note:   'std::pair<long long int, long long int>' is not derived from 'const std::valarray<_Tp>'
   22 | for(auto i:p){
      |            ^