Compilare: user.cpp:29:0: warning: "N" redefined [enabled by default] #define N 250100 ^ user.cpp:26:0: note: this is the location of the previous definition #define N 1100 ^ user.cpp: In function ‘int main()’: user.cpp:67:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("galerie.in","r",stdin); ^ user.cpp:68:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("galerie.out","w",stdout); ^