Compilare: user.cpp: In function ‘int main()’: user.cpp:4:87: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("serviciu.in","r",stdin),freopen("serviciu.out","w",stdout),scanf("%d",&n); ^ user.cpp:4:87: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:4:87: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:6:80: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y),c=(x<y?(y-x):(x-y)),d=x+2*n-y,r=c<d?c:d,m=(r>m?r:m); ^