Eroare de compilare: main.cpp: In function 'int main()': main.cpp:89:20: error: 'sqrt' was not declared in this scope 89 | res += sqrt(e.val); | ^~~~ main.cpp:57:15: warning: unused variable 'c' [-Wunused-variable] 57 | int i, j, c, u, v, n, m,k; | ^ main.cpp:57:18: warning: unused variable 'u' [-Wunused-variable] 57 | int i, j, c, u, v, n, m,k; | ^ main.cpp:57:21: warning: unused variable 'v' [-Wunused-variable] 57 | int i, j, c, u, v, n, m,k; | ^ main.cpp:57:27: warning: unused variable 'm' [-Wunused-variable] 57 | int i, j, c, u, v, n, m,k; | ^ main.cpp:57:29: warning: unused variable 'k' [-Wunused-variable] 57 | int i, j, c, u, v, n, m,k; | ^ Non zero exit status: 1