Compilare: user.cpp: In function ‘int isok(int)’: user.cpp:34:9: warning: unused variable ‘j’ [-Wunused-variable] int j,i,c1=0,c2=0,ca1=0,ca2=0; ^ user.cpp: In function ‘int main()’: user.cpp:59:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lapte.in","r",stdin); ^ user.cpp:60:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lapte.out","w",stdout); ^