Compilare: user.cpp: In function ‘void Solve(int)’: user.cpp:17:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(S); ^ user.cpp: In function ‘int main()’: user.cpp:67:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ", &n, &m); ^ /tmp/ccoq4H5n.o: In function `Solve(int)': user.cpp:(.text+0x17): warning: the `gets' function is dangerous and should not be used.