Owl Get a Life

Compile Error

lvm.cpp: In function ‘int main()’:
lvm.cpp:32:14: error: ‘class std::stack<long long int>’ has no member named ‘front’
32 | int x = a.front();
| ^~~~~
lvm.cpp:34:18: error: ‘class std::stack<long long int>’ has no member named ‘front’
34 | int y = x + a.front();
| ^~~~~
lvm.cpp:39:14: error: ‘class std::stack<long long int>’ has no member named ‘front’
39 | int x = a.front();
| ^~~~~
lvm.cpp:41:18: error: ‘class std::stack<long long int>’ has no member named ‘front’
41 | int y = x * a.front();
| ^~~~~