Compilare: user.cpp: In function ‘int main()’: user.cpp:30:17: warning: format ‘%d’ expects a matching ‘int*’ argument [-Wformat=] scanf("%d%d",&N); ^ user.cpp:47:16: warning: suggest parentheses around ‘+’ in operand of ‘&’ [-Wparentheses] v4=Mod(v3+v1+2*(i-2)); ^ user.cpp:4:17: note: in definition of macro ‘Mod’ #define Mod(x) (x&((1<<20)-1)) ^ user.cpp: In function ‘void r(int&)’: user.cpp:17:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos==MAX)fread(f,1,MAX,stdin),pos=0; ^ user.cpp:22:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(pos==MAX)fread(f,1,MAX,stdin),pos=0; ^ user.cpp: In function ‘int main()’: user.cpp:27:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("12perm.in","r",stdin); ^ user.cpp:28:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("12perm.out","w",stdout); ^ user.cpp:30:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&N); ^