Compilare: user.cpp: In function ‘int main()’: user.cpp:28:13: warning: unused variable ‘x’ [-Wunused-variable] int n,i,x,y,j,k; ^ user.cpp:28:15: warning: unused variable ‘y’ [-Wunused-variable] int n,i,x,y,j,k; ^ user.cpp:26:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gramezi.in", "r", stdin); ^ user.cpp:27:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gramezi.out", "w", stdout); ^ user.cpp:29:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:31:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a[i], &b[i]); ^