Eroare de compilare: main.cpp: In function 'int main()': main.cpp:25:6: error: 'a' was not declared in this scope nth(a + 1, a + k + 1, a + n + 1) // O(n) ^ main.cpp:25:33: error: 'nth' was not declared in this scope nth(a + 1, a + k + 1, a + n + 1) // O(n) ^ main.cpp:12:12: warning: unused variable 'el' [-Wunused-variable] int n, k, el; ^~ Non zero exit status: 1