Compilare: user.cpp:44:0: warning: "mod" redefined [enabled by default] #define mod 1000000007 ^ user.cpp:37:0: note: this is the location of the previous definition #define mod 1000000009LL ^ user.cpp: In function ‘int main()’: user.cpp:78:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("meciul.out","w",stdout); ^