Compilare: user.cpp: In function ‘long long int Comb(long long int, long long int)’: user.cpp:22: warning: unused variable ‘val’ user.cpp: In function ‘int main()’: user.cpp:50: warning: format ‘%i’ expects type ‘int’, but argument 2 has type ‘long long int’ user.cpp:53: warning: format ‘%c’ expects type ‘int’, but argument 2 has type ‘long long int’ user.cpp:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:37: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result /tmp/ccrM4rLN.o: In function `main': user.cpp:(.text+0x29e): warning: the `gets' function is dangerous and should not be used.