Eroare de compilare: user.cpp: In function ‘long long int det(pii, pii, pii)’: user.cpp:34:15: error: request for member ‘first’ in ‘a.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll x=a.first.first*b.first.second+b.first.first*c.first.second+c.first.first*a.first.second; ^ user.cpp:34:29: error: request for member ‘second’ in ‘b.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll x=a.first.first*b.first.second+b.first.first*c.first.second+c.first.first*a.first.second; ^ user.cpp:34:44: error: request for member ‘first’ in ‘b.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll x=a.first.first*b.first.second+b.first.first*c.first.second+c.first.first*a.first.second; ^ user.cpp:34:58: error: request for member ‘second’ in ‘c.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll x=a.first.first*b.first.second+b.first.first*c.first.second+c.first.first*a.first.second; ^ user.cpp:34:73: error: request for member ‘first’ in ‘c.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll x=a.first.first*b.first.second+b.first.first*c.first.second+c.first.first*a.first.second; ^ user.cpp:34:87: error: request for member ‘second’ in ‘a.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll x=a.first.first*b.first.second+b.first.first*c.first.second+c.first.first*a.first.second; ^ user.cpp:35:15: error: request for member ‘second’ in ‘b.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll y=b.first.second*c.first.first+c.first.second*a.first.first+a.first.second*b.first.first; ^ user.cpp:35:30: error: request for member ‘first’ in ‘c.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll y=b.first.second*c.first.first+c.first.second*a.first.first+a.first.second*b.first.first; ^ user.cpp:35:44: error: request for member ‘second’ in ‘c.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll y=b.first.second*c.first.first+c.first.second*a.first.first+a.first.second*b.first.first; ^ user.cpp:35:59: error: request for member ‘first’ in ‘a.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll y=b.first.second*c.first.first+c.first.second*a.first.first+a.first.second*b.first.first; ^ user.cpp:35:73: error: request for member ‘second’ in ‘a.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll y=b.first.second*c.first.first+c.first.second*a.first.first+a.first.second*b.first.first; ^ user.cpp:35:88: error: request for member ‘first’ in ‘b.std::pair<long long int, long long int>::first’, which is of non-class type ‘long long int’ ll y=b.first.second*c.first.first+c.first.second*a.first.first+a.first.second*b.first.first; ^