Compilare: user.cpp: In function ‘long long int CautB(long long int, long long int)’: user.cpp:21:8: warning: variable ‘in’ set but not used [-Wunused-but-set-variable] ll in=0; ^ user.cpp: In function ‘void SumMax()’: user.cpp:52:8: warning: unused variable ‘lastCautB’ [-Wunused-variable] ll lastCautB=0; ^ user.cpp:53:8: warning: unused variable ‘x’ [-Wunused-variable] ll x=0; ^ user.cpp: In function ‘void brut()’: user.cpp:74:13: warning: unused variable ‘s’ [-Wunused-variable] ll mx=0,s=0,x1,x2,y1,y2; ^ user.cpp: In function ‘int main()’: user.cpp:96:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxsubsum.in","r",stdin); ^ user.cpp:97:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxsubsum.out","w",stdout); ^ user.cpp:99:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&n,&m); ^ user.cpp:104:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&a[i]); ^ user.cpp:107:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&b[i]); ^