Compilare: user.cpp: In function ‘int main()’: user.cpp:15:32: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] printf("%d\n",(i&1==j&1)?((i+j)/2):0); ^ user.cpp:6:19: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:6:19: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:6:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:8:88: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d",&a,&b,&e,&f,&g,&h),i=(e<g?(g-e):(e-g)),j=(f<h?(h-f):(f-h)); ^