Compilare: user.cpp: In function ‘int det(int)’: user.cpp:72:26: warning: unused variable ‘cnt’ [-Wunused-variable] int Min=inf,Max=-inf,cnt; ^ user.cpp: In function ‘void read()’: user.cpp:11:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",a[1]+1); ^ user.cpp:12:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",a[2]+1); ^ user.cpp:13:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",a[3]+1); ^ user.cpp: In function ‘int main()’: user.cpp:91:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xsizero.in","r",stdin); ^ user.cpp:92:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xsizero.out","w",stdout); ^