Compilare: user.cpp: In function ‘int binarys1(int, int, int, int)’: user.cpp:116:19: warning: unused variable ‘ans2’ [-Wunused-variable] int ans1 ,ans2; ^ user.cpp: In function ‘int binarys2(int, int, int, int)’: user.cpp:131:19: warning: unused variable ‘ans2’ [-Wunused-variable] int ans1 ,ans2; ^ user.cpp: In function ‘void Read()’: user.cpp:22:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&N); ^ user.cpp:26:35: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(a[i]+1,Nmax-1,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:187:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld2d.in","r",stdin); ^ user.cpp:188:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pscpld2d.out","w",stdout); ^