hottercolder.cpp: In function 'int HC(int)':
hottercolder.cpp:4:5: error: '_v' was not declared in this scope
4 | _v<int> rt(N + 1);
| ^~
hottercolder.cpp:4:8: error: expected primary-expression before 'int'
4 | _v<int> rt(N + 1);
| ^~~
hottercolder.cpp:5:34: error: 'rt' was not declared in this scope
5 | for (int i = 1; i <= N; i++) rt[i] = Guess(i);
| ^~
hottercolder.cpp:5:42: error: 'Guess' was not declared in this scope
5 | for (int i = 1; i <= N; i++) rt[i] = Guess(i);
| ^~~~~
hottercolder.cpp:6:38: error: 'rt' was not declared in this scope
6 | for (int i = 2; i <= N; i++) if (rt[i] == -1) return i - 1;
| ^~
hottercolder.cpp:7:12: error: 'rt' was not declared in this scope
7 | return rt[2] < 0 ? 1 : N;
| ^~
hottercolder.cpp:3:9: warning: unused variable 'i' [-Wunused-variable]
3 | int i;
| ^