lang.cpp:18:1: error: 'unordered_map' does not name a type
18 | unordered_map<pair<ll, int>> x;
| ^~~~~~~~~~~~~
lang.cpp:19:1: error: 'unordered_map' does not name a type
19 | unordered_map<pair<ll, int>> xxx;
| ^~~~~~~~~~~~~
lang.cpp: In function 'void excerpt(int*)':
lang.cpp:50:20: error: 'x' was not declared in this scope
50 | cnt += x.count(t * 100 + i) + xxx.count(t2 * 100 + i);
| ^
lang.cpp:50:43: error: 'xxx' was not declared in this scope
50 | cnt += x.count(t * 100 + i) + xxx.count(t2 * 100 + i);
| ^~~
lang.cpp:58:9: error: 'x' was not declared in this scope
58 | x.insert(t * 100 + i);
| ^
lang.cpp:60:9: error: 'xxx' was not declared in this scope
60 | xxx.insert(t2 * 100 + i);
| ^~~
lang.cpp:54:9: warning: unused variable 'k' [-Wunused-variable]
54 | int k = language(mi);
| ^