foo.cc:3:13: error: two or more data types in declaration of 'type name'
    3 | using III = tuple<int,int,int>
      |             ^~~~~~~~~~~~~~~~~~
foo.cc:7:7: error: 'N' was not declared in this scope
    7 | int q[N];
      |       ^
foo.cc:8:16: error: 'III' was not declared in this scope
    8 | priority_queue<III> heap;
      |                ^~~
foo.cc:8:19: error: template argument 1 is invalid
    8 | priority_queue<III> heap;
      |                   ^
foo.cc:8:19: error: template argument 2 is invalid
foo.cc:8:19: error: template argument 3 is invalid
foo.cc: In function 'int main()':
foo.cc:15:24: error: 'q' was not declared in this scope
   15 |                 cin >> q[i];
      |                        ^
foo.cc:16:22: error: request for member 'push' in 'heap', which is of non-class type 'int'
   16 |                 heap.push({q[i] - q[i - 1] + 1, q[i] - q[i - 1] + 1, 0});
      |                      ^~~~
foo.cc:21:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   21 |                 auto [x,y,z] = heap.top();
      |                      ^
foo.cc:21:37: error: request for member 'top' in 'heap', which is of non-class type 'int'
   21 |                 auto [x,y,z] = heap.top();
      |                                     ^~~
foo.cc:22:22: error: request for member 'pop' in 'heap', which is of non-class type 'int'
   22 |                 heap.pop();
      |                      ^~~
foo.cc:25:22: error: request for member 'push' in 'heap', which is of non-class type 'int'
   25 |                 heap.push({x,y,z});
      |                      ^~~~
foo.cc:27:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   27 |         auto [x,y,z] = heap.top();
      |              ^
foo.cc:27:29: error: request for member 'top' in 'heap', which is of non-class type 'int'
   27 |         auto [x,y,z] = heap.top();
      |                             ^~~

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