Compilare: user.cpp: In function ‘int main(int, const char**)’: user.cpp:9:18: warning: unused variable ‘j’ [-Wunused-variable] int n, c, x, i, j, aux, k = 0, r = 0, l = 0, v[1000001], a[1000001], b[1000001]; ^ user.cpp:9:21: warning: unused variable ‘aux’ [-Wunused-variable] int n, c, x, i, j, aux, k = 0, r = 0, l = 0, v[1000001], a[1000001], b[1000001]; ^ user.cpp:6:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("carti3.in","r",stdin); ^ user.cpp:7:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("carti3.out","w",stdout); ^ user.cpp:12:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &c); ^ user.cpp:15:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^ user.cpp:20:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^