Compilare: user.cpp: In function ‘void zparcurgere(int, int, int, int)’: user.cpp:17:32: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] zparcurgere(i,(y+j-1)>>2+1,(x+i-1)>>2,y); ^ user.cpp:18:30: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] zparcurgere((x+i-1)>>2+1,j,x,(y+j-1)>>2); ^ user.cpp:19:30: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] zparcurgere((x+i-1)>>2+1,(y+j-1)>>2+1,x,y); ^ user.cpp:19:43: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] zparcurgere((x+i-1)>>2+1,(y+j-1)>>2+1,x,y); ^ user.cpp: In function ‘void openIOfiles()’: user.cpp:8:27: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("z.in","r",stdin); ^ user.cpp:9:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("z.out","w",stdout); ^ user.cpp: In function ‘int main()’: user.cpp:26:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:29:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^