Borderou de evaluare (job #668594)

Eroare de compilare: main.c:4:1: error: unknown type name 'using' 4 | using namespace std; | ^~~~~ main.c:4:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std' 4 | using namespace std; | ^~~ main.c: In function 'main': main.c:10:5: warning: ignoring return value of 'freopen' declared with attribute 'warn_unused_result' [-Wunused-result] 10 | freopen("swap.in", "r", stdin); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:11:5: warning: ignoring return value of 'freopen' declared with attribute 'warn_unused_result' [-Wunused-result] 11 | freopen("swap.out", "w", stdout); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:12:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result] 12 | scanf("%d\n", &n); | ^~~~~~~~~~~~~~~~~