Compilare: user.cpp: In function ‘void solve(int, int)’: user.cpp:36:29: warning: unused variable ‘aux’ [-Wunused-variable] int m, i, ok = 1, l, r, aux, k; ^ user.cpp: In function ‘int main()’: user.cpp:91:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("invsort.in", "r", stdin); ^ user.cpp:92:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("invsort.out", "w", stdout); ^ user.cpp:94:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ user.cpp:96:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &x [i]); ^