Eroare de compilare: main.cpp:6:1: error: 'pii' does not name a type pii a[N]; ^~~ main.cpp: In function 'int main()': main.cpp:24:43: error: 'a' was not declared in this scope for (int i=1; i<=n; i++) scanf("%d", &a[i].fi), a[i].se = i; ^ main.cpp:25:10: error: 'a' was not declared in this scope sort(a+1, a+1+n); ^ main.cpp:21:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inv.in", "r", stdin); ^ main.cpp:22:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("inv.out", "w", stdout); ^ main.cpp:23:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ Non zero exit status: 1