Compilare: user.cpp: In function ‘void Solve()’: user.cpp:74:19: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(z==1) ^ user.cpp:88:19: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(z==2) ^ user.cpp:102:19: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(z==3) ^ user.cpp: In function ‘void Read()’: user.cpp:23:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&N,&X.val,&Y.val,&Z.val); ^ user.cpp:26:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:130:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbxyz.in","r",stdin); ^ user.cpp:131:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbxyz.out","w",stdout); ^ user.cpp:132:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^