answer.code: In function ‘int main()’:
answer.code:47:21: error: expected primary-expression before ‘{’ token
   47 |         if (a[0] == {0, 0}) {
      |                     ^
answer.code:47:20: error: expected ‘)’ before ‘{’ token
   47 |         if (a[0] == {0, 0}) {
      |            ~       ^~
      |                    )
answer.code:62:31: error: ‘v’ was not declared in this scope
   62 |         for (auto [l, r, h] : v) {
      |                               ^