Compilare: user.cpp:6:8: warning: overflow in implicit constant conversion [-Woverflow] int op=1e16; ^ user.cpp: In function ‘int main()’: user.cpp:36:9: warning: unused variable ‘la’ [-Wunused-variable] int la=sumi(0,0,0); ^ user.cpp: In function ‘int sumi(int, int, int)’: user.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:27:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hacker3.in","r",stdin); ^ user.cpp:28:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hacker3.out","w",stdout); ^