meetings.cpp:10:11: error: 'span' was not declared in this scope
10 | vll solve(span<int> V) {
| ^~~~
meetings.cpp:10:16: error: expected primary-expression before 'int'
10 | vll solve(span<int> V) {
| ^~~
meetings.cpp:10:24: error: expected ',' or ';' before '{' token
10 | vll solve(span<int> V) {
| ^
meetings.cpp: In function 'vll minimum_costs(vi, vi, vi)':
meetings.cpp:33:5: error: 'span' was not declared in this scope
33 | span<int> S(H);
| ^~~~
meetings.cpp:33:10: error: expected primary-expression before 'int'
33 | span<int> S(H);
| ^~~
meetings.cpp:36:10: error: expected primary-expression before 'int'
36 | span<int> RS(RH);
| ^~~
meetings.cpp:40:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
40 | for(int q = 0; q < L.size(); ++q) {
| ~~^~~~~~~~~~
meetings.cpp:41:30: error: 'S' was not declared in this scope
41 | vll opt1 = solve(S.subspan(L[q], R[q] - L[q] + 1));
| ^
meetings.cpp:42:30: error: 'RS' was not declared in this scope; did you mean 'RE'?
42 | vll opt2 = solve(RS.subspan(n - 1 - R[q], R[q] - L[q] + 1));
| ^~
| RE