Compilare: user.cpp: In function ‘int main()’: user.cpp:9:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("patrat.in","r",stdin); ^ user.cpp:10:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d" "%d",&x,&y); ^ user.cpp:13:17: warning: iteration 125u invokes undefined behavior [-Waggressive-loop-optimizations] a[i]=i*i; ^ user.cpp:11:5: note: containing loop for(i=1;i<=150;i++) ^